Arts Council England provides grants to organisations and individuals in England. The two main funding steams have no deadlines so you can apply at any time.
Get Grants has a funding finder which lists a range of trusts and foundations that provide grant funding for arts and heritage projects:
https://www.getgrants.org.uk/
The White Pube website has a library of successful funding bids that individuals and organisations have shared so that you can see what a successful bid looks like.