Time for more clues, or rather a summary.
20 years continuous participation in the Europa League (a record) = consistently a top performer in their league, but not quite in the European elite or this would have been broken by Champions League knockout stage appearances. Sequence broken this season.
Rat baiting was a sport there = probably close to lots of water
Named their stadium after a revolutionary butcher from the 14th century = Must have been a very symbolic character in some way. There's also a statue of him in the market square.
Fox terriers = Some historic connection to England ?