I have found my Rent-a-Hostel booklet for this year ( things are unlikely to have changed too much) and given the criteria that the Hostel should have over 40 beds / allow smoking / have good road access / be close to other ameneties ....... these seem to fit the bill>br>
LINCOLN.....45 beds (2x2, 1x3.2x6, 2x8, 1x10 )10NOV - 26FEB

PETERBOROUGH ......40 beds (6x2 , 4x4 , 2x6 ) 6NOV - 7APR

LANGDALE ........80 beds (recommended) (2x3-4, 8x5-8, 4x11) 29OCT - 28FEB

LLANGOLLEN (COACH HOUSE) .....56 BEDS (5X2, 1X7, 1X10, 1X11, 1X18)1SEPT - 7APR

slightly smaller is

BEVERLEY ......34 beds (1x5, 1x13, 1x16)1Oct - 7APR

Dates will need a slight adjustment for next year but it seems that late Feb / early march could be an option