LFGSS Summer BBQ

that's true, however london fields is lenient in this respect. I have used lilttle disposable BBQs on multiple occasions and the park keepers are generally ok with it so long as you have the BBQ above the grass so you're not scorching the lawn.

(and clean up after yourself of course!)

I'll take your word for it, I see the signs no bbq's and think maybe having a bbq is a bad idea