Do not use Plumbforce.
I was misled about the work needed to a boiler. Quoted £350 for the job and led to believe it was complex with parts requiring purchase elsewhere.
After 40 mins my tenant informed me the plumber had left. He had installed a £15 filling loop!
...2 hours later the issue simply re-appeared. Plumbforce sent new plumbers round who literally did nothing and left the boiler at at dangerously high pressure. They were really patronising to the tenant as well.
It's been more than a day, chased 5 times and they won't call me back. They have already taken payment and it is even higher than the quoted amount!