Early Matchless frame

Found under the house an ancient Matchless bicycle. My fathers uncles track bike. Anyways over summer I wanna restore it, repaint and get it back out on the road.

First problem i’ve noticed is that the rear track end, one of them is bent, the bottom ‘finger’
I reckon ill just be able to bend it back, but I was wondering(before I make a mistake) if anyone has had any experience with something similar?

Use a ring spanner or a piece of pipe over the end and go slow.