Mike, the West Yorkshire records on Ancestry have images of the original documents, not just transcriptions like FindMyPast. If you have ancestors from the area you really need to get access - your local library or family history centre, either run by a local family history society or the LDS, may be able to help.
Otherwise you could take out a subscription. Ancestry have fairly frequent trial offers as well, which require you to sign up but you can cancel within the time period and not be charged.
Anne