Hi
Freebmd coverage for that period is 99.9%
To lookup the marriage you have to narrow the date down by providing details of the quarter in which it took place - otherwise it means checking 12mths marriages.
That's why I looked for it on freebmd and couldn't find it in 1928. If you have the christian name of Crane and who he or she married, you can check freebmd to verify the year and quarter
There were 14 Crane marriages in Wiltshire listed between 1925-1930 but none were in the Chippenham Registration District
There are no Crane births in Chippenham 1928-1940
There was also a Chippenham in Cambridgeshire which came under Newmarket RD for that period but there were no Crane marriages there in that period