There is no special source of funding available for Changing Places toilets.
Some venues have privately funded their Changing Places toilet, others have obtained funding from different sources.
The type of organisation you are and where you are placed geographically affects what funding you can apply for.
The following resources may help you.
Funding sites that compile UK-based sources of funding:
Funding resources for community and voluntary groups:
Business grants and support:
The grants and support directory allows you to search for potential sources of help with starting up or business development