Nice clear picture, even if posted 3 times .
The bank looks to be about 6ft high, so shouldn't pose any great threat.
I think it might be worth planting Helichrysum petiolare, this would mask
the bank and should prove to be perennial I grew a 30 ft run of it outside
ere in South Wales for around 5 years before I moved away from it.

--
David Hill
Abacus nurseries
www.abacus-nurseries.co.uk