I thought the 12 week scan was automatically provided everywhere by the NHS and was suprised to read that it's apparently not the case.
eoin-clarke.blogspot.co.uk/2012/04/womans-right-to-12-week-pregnancy-scan.html
As well as this blog post, this blogger has also tweeted that free 12 week scans are being scrapped by private health companies taking over maternity services in the SW, because they're deemed as not essential. 