Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Thorne and Hatfield Moors
Table title:
Locomotive details
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Location </th><th colspan=1 rowspan=1 > Builder </th><th colspan=1 rowspan=1 > Type </th><th colspan=1 rowspan=1 > Built </th><th colspan=1 rowspan=1 > Scrapped </th><th colspan=1 rowspan=1 > Works number </th><th colspan=1 rowspan=1 > Notes (Most details from Booth 1998. Some from Limbert & Roworth 2009) </th></tr>
<tr> <td colspan=1 rowspan=1 > Moorends </td><td colspan=1 rowspan=1 > Moorends Works </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1947 </td><td colspan=1 rowspan=1 > 1960 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Built from wooden wagon chassis and Austin Swallow car by works fitter. </td></tr>
<tr> <td colspan=1 rowspan=1 > Swinefleet </td><td colspan=1 rowspan=1 > James & Frederick Howard </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1930 </td><td colspan=1 rowspan=1 > 1959 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Bought second-hand in 1955. 31 hp petrol engine replaced with Dorman diesel engine by 1956. </td></tr>
<tr> <td colspan=1 rowspan=1 > Swinefleet </td><td colspan=1 rowspan=1 > Ruston and Hornsby </td><td class="highlighted"  colspan=1 rowspan=1 > 4w LBT </td><td colspan=1 rowspan=1 > 1959 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 432661 </td><td class="highlighted"  colspan=1 rowspan=1 > 31.5 hp 2-cylinder 2-YDAL engine. Named "Simba". </td></tr>
<tr> <td colspan=1 rowspan=1 > Medge Hall </td><td colspan=1 rowspan=1 > Ruston and Hornsby </td><td class="highlighted"  colspan=1 rowspan=1 > 4w LBT </td><td colspan=1 rowspan=1 > 1959 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 432665 </td><td class="highlighted"  colspan=1 rowspan=1 > 31.5 hp 2-cylinder 2-YDAL engine. Transferred to Swinefleet in 1966. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Ruston and Hornsby </td><td class="highlighted"  colspan=1 rowspan=1 > 4w LBT </td><td colspan=1 rowspan=1 > 1962 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 466594 </td><td class="highlighted"  colspan=1 rowspan=1 > 31.5 hp 2-cylinder 2-YDAL engine. Moved to Swinefleet 1969. </td></tr>
<tr> <td colspan=1 rowspan=1 > Swinefleet </td><td colspan=1 rowspan=1 > Lister </td><td colspan=1 rowspan=1 > 4w RM2X </td><td colspan=1 rowspan=1 > 1964 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 53976 </td><td colspan=1 rowspan=1 > 8.5 hp. Regauged to 2 ft 6 in (762 mm) after preservation. </td></tr>
<tr> <td colspan=1 rowspan=1 > Swinefleet </td><td colspan=1 rowspan=1 > Lister </td><td colspan=1 rowspan=1 > 4w RM2X </td><td colspan=1 rowspan=1 > 1964 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 53977 </td><td colspan=1 rowspan=1 > 8.5 hp. Attacked by vandals with a mechanical digger in 1991. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Lister </td><td colspan=1 rowspan=1 > 4w RM24 </td><td colspan=1 rowspan=1 > 1964 </td><td colspan=1 rowspan=1 > 1987 </td><td colspan=1 rowspan=1 > 54184 </td><td colspan=1 rowspan=1 > 8.5 hp. Moved to Swinefleet after 1975 </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Lister </td><td colspan=1 rowspan=1 > 4w RM1 </td><td colspan=1 rowspan=1 > 1967 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 55471 </td><td colspan=1 rowspan=1 > 4.25 hp. Moved to Swinefleet 1969. Dismantled early 1980s. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Simplex </td><td colspan=1 rowspan=1 > 4w 40s </td><td colspan=1 rowspan=1 > 1967 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 40s302 </td><td colspan=1 rowspan=1 > At Crowle Peatland Railway, undergoing restoration. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Simplex </td><td colspan=1 rowspan=1 > 4w 40s </td><td colspan=1 rowspan=1 > 1971 </td><td colspan=1 rowspan=1 > 1988 </td><td colspan=1 rowspan=1 > 40s378 </td><td colspan=1 rowspan=1 > Dorman 2LD 40 hp engine. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Hunslet </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1974 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 7366 </td><td colspan=1 rowspan=1 > Perkins engine. Moved to Swinefleet by 1988. Regauged to 2 ft 6 in (762 mm) after preservation. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Hunslet </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1974 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 7367 </td><td colspan=1 rowspan=1 > Perkins engine. Regauged to 2 ft 6 in (762 mm) after preservation. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Fritz Schöttler (W Germany) </td><td colspan=1 rowspan=1 > 4w Diema DFL 10/11 </td><td colspan=1 rowspan=1 > 1974 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 3543 </td><td colspan=1 rowspan=1 > 8.5 hp engine later replaced by a 10 hp Deutz engine. Disused from 1979 to 1983. </td></tr>
<tr> <td colspan=1 rowspan=1 > Swinefleet </td><td colspan=1 rowspan=1 > Diema </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1976 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Built at Swinefleet from parts supplied by Diema. Rebuilt 1986 with parts from Diema 3543. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Simplex </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1949 </td><td colspan=1 rowspan=1 > 1989/90 </td><td colspan=1 rowspan=1 > 10159 </td><td colspan=1 rowspan=1 > Bought second-hand. At Swinefleet by 1982. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Simplex </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1950 </td><td colspan=1 rowspan=1 > Sold </td><td colspan=1 rowspan=1 > 10160 </td><td colspan=1 rowspan=1 > Bought second-hand in 1977 from London Brick Co, Arlesey. Sold to May-Gurney 1984. Worked on Southend Pier contract in 1985. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Simplex </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1955 </td><td colspan=1 rowspan=1 > 1987 </td><td colspan=1 rowspan=1 > 10455 </td><td colspan=1 rowspan=1 > Bought second-hand in 1977 from London Brick Co, Arlesey. </td></tr>
<tr> <td colspan=1 rowspan=1 > Swinefleet </td><td colspan=1 rowspan=1 > Simplex </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1978 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 40SD507 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Simplex </td><td colspan=1 rowspan=1 > 4w </td><td colspan=1 rowspan=1 > 1983 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 40SD527 </td><td colspan=1 rowspan=1 > Out of use by 1994, abandoned in 1997. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Schöma </td><td colspan=1 rowspan=1 > 4w+4w CHL-60G </td><td colspan=1 rowspan=1 > 1990 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 5129 + 5131 </td><td colspan=1 rowspan=1 > 78 kW master unit with powered slave unit. At Crowle Peatland Railway awaiting restoration. </td></tr>
<tr> <td colspan=1 rowspan=1 > Hatfield </td><td colspan=1 rowspan=1 > Schöma </td><td colspan=1 rowspan=1 > 4w+4w CHL-60G </td><td colspan=1 rowspan=1 > 1990 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 5130 + 5132 </td><td colspan=1 rowspan=1 > 78 kW master unit with powered slave unit. Locomotive at Hatfield Works, carrying "The Thomas Buck" nameplate. </td></tr>
<tr> <td colspan=1 rowspan=1 > Swinefleet </td><td colspan=1 rowspan=1 > Schöma </td><td colspan=1 rowspan=1 > 4w+4w CHL-60G </td><td colspan=1 rowspan=1 > 1991 </td><td colspan=1 rowspan=1 > Preserved </td><td colspan=1 rowspan=1 > 5220 + 5221 </td><td colspan=1 rowspan=1 > 65 kW master unit with powered slave unit. Named "The Thomas Buck" in 1993. At Crowle Peatland Railway awaiting restoration. </td></tr>
</table>
Question:
When did Thorne and Hatfield Moors most recently build locomotives, and what class were they?
Answer:
Thorne and Hatfield Moors most recently built class 4w+4w CHL-60G locomotives, which were built in 1990-91.