Central heating repipe

Hi everyone.
Iv recently retired and deregistered from Gassafe after 30years membership, but really that has nothing to do with my question, just thought I would throw it in...lol
Anyway my central heating system needs repiping and looking for some idea of cost, new boiler fitted about 7 years ago and 3 years ago I installed underfloor heating ( wet).
Problem is the pipework is original and impossible to get to, so I figure repipe.
I could do it myself but I'm no longer fit enough so looking for someone who knows what they are doing to repipe to existing radiators and boiler , I can labour to him or just make tea, but it really wants doing as a final job.
Any input greatly appreciated

 

Alan you will need to say where you live you know. if its in the n/west ie Merseyside I know enough old farts who are still reg to help you - they are my drinking pals on sat mornings !

 

Doh! Sorry forgot location , I'm in York.

 

How many drops
How many rooms
How many rads
Is it full of furniture
Normal floor boards or chip board

Then you need to find someone who wants to work for a fussy old plumber