John Rowland wrote:

I know Greenford fairly well, but I don't understand your
question. Since the railway is on a high viaduct here - I think
Greenford is probably the highest LU station above ground level
- what were you hoping to see from ground level but the
underside of viaducts?

I was under the impression that there was a spot accessible from the
ground that would allow you to see the signal box and the station. I
know both railways are on high viaducts - I was able to see that quite
clearly when I was scouting around.

Limiting yourself to public rights of way seems curious as well,
since the worst that will happen is you can get told off (unless
it's military).

I'm not interested in the potential hassles of dealing with intrusion
on private property.