Job in Leyton E10 - Cast Soil Stack Replacement

[thedukewood]

I need a quote to replace a soil stack ( cast ) in Leyton e10. The stack is already in plastic at the bottom. There also needs to be amendment to branch to accomodate a change of position of the bathroom in the upstairs flat. BTW - this is one up/ one down flat arrangment.

There is access to the garden through both flats. Thank you