Can't offer any direct advice, but if you go to CC website you can search CLs by county or major towns with a filter of things you want, e.g. EHU, public transport etc.
Then look up the postcode on Google Earth and you can generaaly find the site and see how it looks relative to nearby roads, features etc. and also what the access looks like.
I've found Google Earth very useful for this although the picture quality is not uniformly good, SW Scotland being quite poor, for example