I don't know which motorway service stations Dot is getting her fuel from but they must be different from the ones I use. Many years ago petrol at motorway services used to cost at least 10% more than elsewhere, but most of the ones I use nowadays charge the same price per litre as Asda and Tesco do (which is a great deal cheaper than some of the local garages here in Suffolk, which currently charge over £1.30 per litre).
Motorway service areas have to pay megabucks to the Government for the right to operate the facilities, so it's unsurprising that they pass their costs on to their customers.
To help choose the best motorway service area along your route, see here:
http://www.motorwayse...info/list.php?by=road
For national award winners, see here:
http://www.motorwayservices.info/awards.php
To cast your vote for the political party which you think will best help users of motorway service areas (and for much more information and discussion), start here:
http://www.motorwayservices.info/
Chris