What to do with Excess Clothing for Charities/Social Enterprises?

Hello there, I work for a social enterprise, and we currently have an excess amount of clothing donated to us.

We are currently sell clothing in our shops, as well as online platforms such as Vinted as a way for them to get a second life and not just thrown away into landfill. We also usually are able to give bags of clothing to countries like Africa for those in need of them. However, the current places we use, are at full capacity, as no one is able to send overseas, so we're at a gridlock right now with our storage unit becoming full.

We were wondering what other charities and social enterprises are doing with their excess clothing and rags? There appears to be a distinct lack of companies accepting donations! Anyone else bursting at the seams?

Is there any other way for us to shift clothing in a quick manner? Any help would be appreciated (:

UK BASED