fishperch.....I'll try to explain a littler better;
After passing through the actual farm complex, the main ski lake with it's ski hut is on the left hand side. At one time another small square lake/pond existed on the right hand side and this contained some very good fish. It's quite possible Randall filled in this square lake - many years since I fished it !
The other lake I mentioned (where I had a punt) was further over to the RIGHT going toward the small lake belonging to Marlow which sits on the By-pass. This was filled in back in the 1980's......
From memory, the Westhorp ski pit offered tench (and good roach) and the best I caught was 6lbs (back in the late 70's !) from the bank which sits next to the sewage farm - a long walk from the car !
I also caught roach to 11/2lbs in good bags of fish caught fishing into the night......
ALL OF THIS WAS A LONG TIME AGO, THOUGH !
Personally, if I were in your shoes I would forget Westhorp and concentrate on the two Marlow Angling pits which sit on the By-pass as these offer the best chances in my view. The smaller of the two, known locally as ' The roach pit ' held carp of some 38lbs at one time, but this fish dies some time ago. Held some good tench as well.....
Best access to both pits is via the blue bridge over the by-pass, and it's well worth walking the lakes in the evenings when big tench can be seen cruising around. LIKE ANY WATER YOU NEED TO DO SOME FOOTWORK AND DEDICATE SOME HOURS TO FISHING THESE WATERS TO BUILD UP A PICTURE OF THEM.
I SPENT 10 YEARS FISHING THEM EVERY WEEKEND AND DURING THE EVENINGS AFTER WORK AND I CAUGHT GOOD FISH, BUT THEY ARE NOT EASY WATERS.........................
Hope this helps..