Ah, Sunny Blackpool, biggest problem I've seen round that area is corrosion due to the Sea Air. Might be worth making sure all fittings are either galvanised (bracket) or Stainless Steel (bolts), zinc plated nuts can be protected with self amalgamating tape.
Looks nice and compact, never used one of those brackets as they look difficult to get vertical? On the face of it, there is nothing to stop you fitting a "T" bracket at the top for re-enforcing if strength ever becomes an issue.