well I went on the site, entered my make and model of boiler and it so old
it has no grading (but likely to be less that 70% efficient)

But it then requires me to buy from a dealer rather than purchase off the
shelf at B&Q etc.....

so I save £ 400 by getting a rebate, but pay £ 2000 to British Gas for the
privilege.

Anyone found the work around yet?
--
Vass