hi stephen,
Don't know if this will help as I've not been near the place for for about 6 years.
I used to live in Tarleton up to '97 and fished the Croston / Bretherton Clay pit quite a lot.
It had the normal spread of species Roach, Bream, Perch, Carp, Tench etc. and I believe Pike but even though I tried for them never did catch one.
This may have had something to do with the clubs attitude to the pike at the time!!!!!
I fished it mainly for the Carp and was at the time, one of about three anglers doing so. There may have been others but I only came across two.
Usually fished over night sessions and regularly took 5-10 fish, mainly mirrors to 8-10lbs. Best one went 16lb 8oz and a few commons at 4-8lbs
Another thing was their were a few of the other members who did'nt particularly like the Carp in their water and blamed the lack of sport for other specis on this and the Carp Anglers??????
Anyway if its not changed i.e. there was talk of netting and removing the Carp before I stopped fishing there it should be even better as the carp sould be quite a bit bigger now.