asdf wrote
[...]
Whoever your provider is, 0845 is almost certainly (considerably)
more
expensive than local rate. It's a sort of premium rate number, where
some of the cost of the call goes to the person you're calling.

If you are on the LUS or a basic business tariff and live in Grantham
or Cambridge 0845 will be cheaper.

Officially offering both an 0845 and 020 7227 7886 is the best policy.

--
Mike D