If you go into the LDS site,
www.familysearch.org , - click on Library - then Family History Library Catalog - Keyword search - put in Society Friends Bedfordshire and you'll see the records on microfilm that are available to order from, and viewing at, your nearest LDS Family History Centre.
Society of Friends records are extremely good. Just google Society of Friends and there are plenty of sites that will tell you loads about them - but I suggested this when you asked a similar question in November.
David