Reparing gully/ drain.

Audgg

The gully/ drain kept geting blocked. Has been fixed now but the surrounding is crumbling and needs fixing. Plus need a new cover, however they do not sell ones the size i require. Any advice please?

FreeBear

Personally, I'd dig the whole lot out and feed the two smaller pipes into the back of a bottle gully (you can get ones with a back inlet). The gutter downpipe, fit a FloPlast D94 Debris Gully and consider running it off to a dedicated soakaway. It is going to involve a bit of digging and rejigging of the underground drain - You should be involving building control for any work on the drains.

Alternatively, break up the concrete in the gully, and rebuild. Cheaper and quicker, but you'll still have issues with blockages.