I suffered a couple of hook pulls a little while back on the same sesh, really annoying...…. I decided to add a bit more weight to the pop up rigs I was using..... Next two enquiries on that rod resulted in 2 tench hooked and landed. Not the carp I was hoping for, but I think the added weight helped the hook stick a little better...…… Bad luck mate, tricky little lake though, very pressured. If ever there was a case for fish feeding "on edge", then that place would be on the list. Just makes them feed a bit more carefully, bit more riggy imo……. The way I see it, you've caught from there already, which takes a bit of doing. And you are getting picked up now and then..... Compare this to when you started on there, you've come miles mate...…. Inches away from something really special imo… 😊