Drain repairs

hatt55

I had a drain CCTV survey (just investigative - didn't know where the pipes went but have had some damp issues). This is for a Victorian terrace.

The drainage survey showed that there was some displacement of the joints in the area where the soil pipe connects into the combined sewer beneath the ground (second photo). The same company have quoted to install two 'patchboxes' within the pipework, which I understand means that they don't have to excavate anything and essentially just create a better seal in the joint from the inside.

The quote I have received is £1650 inc. VAT. This is a bit more than I expected as there is no digging involved - any idea if this is reasonable?

On a related note, when the person was on site doing the survey, they also picked up that where the downpipe from the guttering drains to a grate, it isn't very well directed. The drain itself looks in poor condition and there is almost a void space beneath the concrete (which is badly laid and in an ideal world would be completely replaced) - first photo. I though they would be quoting for almost replacing the entire joint, to stop water getting 'under' the concrete and also better direct the downpipe. Does such a thing exist? If I'm getting the drains fixed I'd almost prefer to try and resolve multiple things in one go.