We have a UK Partnesrship for our self catering business (so no business number) Our business is our only income source but I can't seem to register as a business or even a partnership without one.
@Sarah4804 Are you trying to list holiday accommodation? If so, and assuming it will count as a furnished holiday let, just stick it in one name. The revenue for FHLs can be directed to any owner at the discretion of the owners. Hope this helps!