http://www.flickr.com/photos/42303600@N05/4022682310/

Here is the state of my boiler. It's in a flat that was rented out and this
is the first chance I've had to look around.

What's causing the leak? I thought it was condensation at first, but
obviously not!

All the pipe joints are dry. I hope it's not one of the welded joints
weeping, but don't know what else it could be.

Repairable? Or new boiler?

I've drained it in case it decides to "let go"!

Thanks in advance for any replies.

Mark