London rock used to be cracking a long time ago, but its been several years since I have seen anything at all come off there at all.
Pilot / red light fishes in a huge sea, 3 seasons back 2 doublers came off there on the same day but that was an exceptional catch. The immediate right hand side (south side) of the Heugh low water is also good in a massive sea, better shot imo for codling – but you WILL lose a lead a chuck, the ground is tackle hungry as you get, don’t think I’ve ever pulled in clean from there!