Who is responsible for redirecting a waste pipe?

[adliterate]

I live in a first floor flat in a leasehold property and we are refurbishing our bathroom.
As a conversion from a victorian house services travel through each of the flats to reach others.
In particular a waste pipe from the flat upstairs travels down through our bathroom and enters our soil pipe near the toilet. The waste pipe is for the bath and sink upstairs, their soil exits the building somewhere else.
We want this waste pipe removed from our property and from joining our soil as this doesn't suit the way we are going to plumb the new bathroom.
So the question is are we within our rights to ask for the pipe to be redirected? And in addition who is responsible for doing this the upstairs flat's leaseholder or us?
Thank you.

 

[erj]

good question, I would say if you want it moving you will have to pay and any damage that might be done upstairs

 

[rocketmanbkk]

As erj says.

 

[snowhead]

The O.P will have to pay as above.

However the Flat above doesn't have to agree to the pipe being moved as they have an established right, which may be written into the Lease and it may not suit their existing bathroom layout.

 

[lame plumber]

you may well find you cant touch any of it as the freeholder/landlord "owns" it, if you start moving the properties services without his or the managing companies permission you may land yourself in deep pooh and be billed some severe damage claims. If my tenants start any work that is part of the services in my properties, they get hit very hard with bills etc and they dont have any choice about not paying as its a clearly written in their leases, ultimately if they failed to pay and put things right the landlord could take them to court to revoke their lease!! My advice is leave well alone until you have permission in writing to go ahead and have agreed for the payments to be made for the landlord to have the works completed.