Max Demian brought next idea :
How much extra is that costing him? 'Normal' ADSL should be OK unless he
lives a long way from the exchange.

I am 0.5Km with 16Mb, he is around 1.5Km with 6 to 8Mb. He rarely uses
what he has at the moment, apart from for email. It is costing him and
extra £4 pm.