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:
RAF Tholthorpe
Table title:
Operational units and aircraft
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Unit </th><th colspan=1 rowspan=1 > From </th><th colspan=1 rowspan=1 > To </th><th colspan=1 rowspan=1 > Aircraft </th><th colspan=1 rowspan=1 > Version </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > No. 420 Squadron RCAF </td><td colspan=1 rowspan=1 > 12 December 1943 </td><td class="highlighted"  colspan=1 rowspan=1 > 12 June 1945 </td><td class="highlighted"  colspan=1 rowspan=1 > Handley Page Halifax Avro Lancaster </td><td colspan=1 rowspan=1 > Mk.III (1943-1945) Mk.X (1945) </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > No. 425 Squadron RCAF </td><td colspan=1 rowspan=1 > 12 December 1943 </td><td class="highlighted"  colspan=1 rowspan=1 > 13 June 1945 </td><td class="highlighted"  colspan=1 rowspan=1 > Handley Page Halifax Avro Lancaster </td><td colspan=1 rowspan=1 > Mk.III (1943-1945) Mk.X (1945) </td></tr>
<tr> <td colspan=1 rowspan=1 > No. 431 Squadron RCAF </td><td colspan=1 rowspan=1 > 15 July 1943 </td><td colspan=1 rowspan=1 > 10 December 1943 </td><td colspan=1 rowspan=1 > Handley Page Halifax </td><td colspan=1 rowspan=1 > Mk.V </td></tr>
<tr> <td colspan=1 rowspan=1 > No. 434 Squadron RCAF </td><td colspan=1 rowspan=1 > 13 June 1943 </td><td colspan=1 rowspan=1 > 11 December 1943 </td><td colspan=1 rowspan=1 > Handley Page Halifax </td><td colspan=1 rowspan=1 > Mk.V </td></tr>
</table>
Question:
What operational units took Avro Lancasters until June 1945?
Answer:
The No. 420 and 425 Squadrons took Avro Lancasters until June 1945.