Table:
text: List of tunnels in the United Kingdom
Northern Ireland
Northern Ireland
County Tunnel Type_ Length_Imperial Date_of_opening
Londonderry Castlerock Rail 668 yd 1845 - 1853
Londonderry Downhill Rail 307 yd 1845 - 1846
Armagh Lissummon Rail 1759 yd early 1860s
Down Binnian Tunnel Aqueduct 2.5 miles 1948 - 1952
Antrim Whitehead Rail 145 yd 1862 - 1994
Tyrone Dungannon Rail 800 yd 1862

Question: Which tunnel in the list of tunnels in the UK has an imperial length of 307 yd?

Question: What type of tunnel is the Downhill Tunnel in the list of tunnels in the UK?