I am thinking of going private to get it removed, it has tripled in size in a few years and it would have to be right in the middle of my forehead, i have self esteem issues already, I am just glad I'm a hat wearer so nobody ever sees it these days. It's not massive by any stretch but it is growing.
If it has come back G, I reckon they didn't remove the cyst sack, just the puss. It is that which puts me off DIYing it.
I think it's about £200 private but I think Leeds may be the closest place from the little bit of checking I've done.