Whipping,
Being SATCO Northolt, I can confirm the comments made by ATCO Two. What's more, whilst in the Northolt Radar Manoevring Area (NRMA), military controllers may allow SVFR traffic to take visual seperation on all Northolt IFR traffic. In other words, you can be handled as if you are SVFR within Class D airspace.
Don't you mean "as if you are
VFR within Class D airspace"?
WF.