On 14 Feb, 11:19, wrote:
In article
,

(lonelytraveller) wrote:
On 13 Feb, 15:30, "Peter Lawrence" wrote:
On Fri, 12 Feb 2010 17:34:42 -0800 (PST), lonelytraveller

wrote:
Why is there a door in the ceiling at the south end of platform 10 at
moorgate (behind that cage thing) ?

Was that originally a vent for diesel fumes?

I thought that line was always electric?

Not if you mean the Metropolitan Widened Lines.

No, I mean the ones that go to Finsbury Park. The one marked platform
10, in fact.