Pike on the Thames

Hi

I'm going fishing for pikein the thames (or the part of it called the isis) and I was wondering what to use and how to use it. My friend accidentally caught a small bleak and livebaited it and cought a 13lb pike but I'm not sure how he fished it. (He is being cryptic). Any help would be great.

I lived on the Thams in the mid 90s and used to catch lots of pike by wobbling sprats, bought from the fishmongers.