I pulled the following from the NHS England website. It seems...

I pulled the following from the NHS England website. It seems the Health Systems Support Framework (HSSF), of which the Accredited Suppliers are a part, is only updated sporadically, and hasn't been updated for a number of years. That seems a shame, but it is what it is I guess.

Information for new suppliers who are interested to qualify in the HSSF
FrameworkSuppliers were admitted to our existing Framework following a PCR (Public Contract Regulations) 2015 compliant procurement process.New suppliers can only be considered to the framework when we undertake a new procurement process and we haven’t decided a set timelines for this.When we undertake the new procurement a contract notice will be published via the governments Find a Tender Service: https://www.find-tender.service.gov.uk/Search.We would advise you to monitor this site for future opportunities.