Turbo oil feed.....
I guess that's why it was leaking, and instead of checking why it was leaking I opted to keep on tightening.
99.9999999% sure I checked sealing faces and washers before fitting and that I didn't hit it today whilst trying to undo the broken banjo bolt. Doubt a washer could have caused it whilst I was overtightening? Doesn't sound possible.
Anyway, what's done is done, need it sorted - any ideas on how much it would cost? Waiting to hear back from a friend but until then if anyone has had experience with similar sh!t, a rough price would be nice.
Can't be arsed to have a go myself, can't even be bothered to refit the turbo/mani myself either.
Edit - I keep looking at it and it looks as though I've hit it? I can't see how the hell I would have done that. I did try tapping the bolt with a long screwdriver but I didn't slip and obviously wasn't hitting it hard enough to slip. Guess it doesn't matter now though.