YES!!!
Go to the Comely Bank Clinic:
(1st floor) Comely Bank Clinic, corner of Addison and Ravenswood Road E17 (Walthamstow Village)
On the noticeboard is the number of la leche bf support.
Their representative came to my house when I was struggling, (embarrassedly) with dd after a perfect bf experience with older ds. She literally sat with me, repositioning, and helping to hold dd while I attempted new positions. They have a drop in cafe as well, I think near Bakers Arms.
Can't recommend them highly enough, so kind, go tomorrow!!