Advice on quick growing hedging or similar?

Hello I am looking to grow something along my garden border wall can anyone recommend anything fast growing
thanks

One of the best for Caithness is Escallonia - very wind and salt tolerant, once established grows very well and is evergreen but does lose some of its leaves in winter (have never seen one bare yet)

Agree with pat, Escallonia macrantha is a good bet. You should also consider the hardy Fuchsia (riccartonii), or Lonicera Bagessen's Gold - looks like sunshine on the cloudiest of days.