That's a cracker Alex
. Sounds like your garden is attracting the right predators. We had had several cold and miserable winters and our ladybirds (barnie bees for me) seemed to have disappeared, so last year I bought in some 2-spots, and they have reappeared this year, so we must have had some larvae too. Do you know if 2-spot larvae are different to 7-spots? I have certainly seen the type you posted, great to watch, voracious wee things