To my knowledge, not to social enterprises for being social enterprises. I have run one for the last 4 years and have only seen grants available where a particular issue is being address. it's been my experience that the regional development agencies who may promote such grants don't tend to reply anyway.
Check out your district council or equivalent, your county, your regional development agency and charitable trusts. Although business Link knows a lot about this, business funding is very complex and it's worth doing your own research.