On 30/04/2019 22:02, ss wrote:
I am refurbishing the bathroom but getting a plumber to disconnect water
, I will then tile walls & floor remove sanitry ware and replace.
plumber has said that the only thing the loft water tank is feeding is
the cold water for the bathroom sink as I have a combi boiler (mains feed)
So, he is going to bypass the loft water tank and make it obsolete.
Does this sound the correct thing to do?

Basically yes, but depends on whether you are happy with your combi. If
you think you might want to change to a system boiler with a hot water
tank, or putting in solar heating for DHW you will need a (small) loft
header tank. A lot also depends on the age and structure of the house
and the age of the plumbing. Keeping a cold feed into the loft is
something else to go wrong, but might save disruption if you need one later.