routing pipework

Hi, we currently have a vertical soil vent pipe. It is in the way of where we would like to build a rear extension. I’m hoping someone could offer some guidance here as without moving this pipe we’d be unable to open up the rear of the house. Is it likely to be acceptable to remove the bottom...

I need to run central heating pipe horizontally under the floorboards of an upper floor. I need to go through only one 75mm wide beam, but I'm wary of boring or notching it, also because that would be quite close to the wall bearing the beam. So I thought of running an 8mm or 10mm pipe...

I'm a reasonably competent DIYer. Pic shows current configuration of toilet in downstairs cloakroom. We are planning a refit with all new fittings, decor, etc. Obvs, but soil stack is in right hand corner. I'm going to box-in new cistern to hide soil pipe from loo and install a back-to-wall...