For information for less able visitors, in the first instance we suggest you contact the individual advertisers to check what facilities they can offer to help make your visit more accessible. 
The town map shows disabled toilets in town and all main car parks have disabled spaces – check on the Oswestry Town Council web site for more details.
Guides and suggestions are available at: https://www.ableize.com/disabled-groups-and-clubs-by-county/shropshire/