It varies.. I guess the UK offers riders an opprtunity to improve their technical skill set. However the big meetings are always going to be on the bigger faster tracks
There are Pro's and Con's for whatever shape you find in this country. Trelawny was 230 meters some great racing there certainly when we visited.
Sheffield and Poole in terms of the 4 meetings I saw there wasn't overly moved by .
Redcar, Scunthorpe and Workington would be Top 3 tracks visited from a racing perspective