Fed a few Brazem groundbait to kick start the swim at 6am, then fed nugget size ball every 10min... but the swim didn't kick start. The tench there seem only like Mathew's brazem pellets, but not my groundbait.
I swtiched back to 4mm+5mm pellets after an hour and I started to catch fish steadily. But he roach was getting more and more, they took the 4mm expander in no time, and kept nicking 6mm expanders!
Then I bombed 2 large ball of fishmeal groundbait in either to scare them away / fill them up. It worked! Then after a while I managed a fat tench around 6.5lb

Here is my net, 3 tench 2 crucian 1 skimmer and some stupid roach. As it's so hot I am quite happy with it!

Ps - thanks Mathew came down and took the pictures.