A couple of beer festivals in the West Yorkshire area for starters:
Sat/Sun/Mon (29th-31stMay) Salts Sports Association 2nd Beer Festival , Saltaire (in the Sports Club - down from the railway station at Saltaire, over the river, turn left and carry on). Apparently this is being run in conjunction with Bradford Cathedral Choir and all beers will have some sort of ecclesiastical link (so hopefully there'll be Bishops Farewell, and some of the Durham and Abbeydale Beers (presumably the latter's Black Mass will not be available!) All beers £2 a pint.
Fri/Sat/Sun/Mon (28th -31st May) Fox and Goose, Hebden Bridge.
40 or so beers as voted for by customers (always a good way of ensuring beers that people actually like - not so good for the tickers)
Incidentally, for those wondering what to do today or tomorrow the Desbury Beer Festival is in full swing.