You can still store up to 275L without a license, which is surely enough for the use case we're discussing. I can't help but think you're nitpicking.

However, I picked a random Council to see, and it looks extremely doable for a homeowner with the space to do so to get a license to store up to 2,500L. It's not even particularly expensive (£44 pa)

http://www.suffolk.gov.uk/community-and-safety/suffolk-tradi...