Looks like the bottom waste pipe into the strap bass It's push fit pipe so you could cut it and repair with a Mac Alpine universal coupling - that will allow you to examine/replace the strap boss
You are poster #3 - are you still using that knackered monitor . Get Vinn to buy you a new one . Talking to yourself now :rolleyes: and start using apostrophe's - don't be a bell end all your life
Keep Calm and Carry on . Dig for Victory. Why don't you go to Jamaica with your friends Vinn, Bobasd , Roy and Pete. ? Or carry on here , we all need a laugh :LOL:
A wonderful terrace where the end stack, the blonde lady's house , is already lower than the rest - option A get it gone (y) probably cheaper than new lead - IF you can find someone competent to do leadwork. And they'd want to do it over the ridge tile.