On Tuesday, 20 February 2018 09:52:22 UTC, The Nomad wrote:

So is Worcester-bosch still the top brand?


The contributors on https://www.diynot.com/diy/forums/plumbing/ would venture that Worcester-Bosch is not, and has never been, the top *boiler*. It is though the top *brand* due to the company's huge marketing budget.

Intergas seems to be what many fitters recommend on that forum. Personally, I have a Viessmann which has been OK. Its predecessor (a Potterton) was a disaster.