Most people either run with Schumacher mini spikes or mini pins (yellow compound) on the rear when the track is dry.
Fronts for 2wd either Schumacher cut staggers or standard staggers (yellow compound) narrow/low profile in the dry which you can still probably use when damp.
Not had too much experience in the wet at Batley
but for the rear I have some Ballistic Buggy mini spikes (Green compound)
(Edit - What Chris said)