Hi Jon, Chris & Paul
I've been researching East Moor for a couple of years now and have quite a bit of info, albeit uncollated at present!
I've watched the place rapidly return to agriculture with sadness but there are still plenty of interesting remnants to view.
The building in the centre of the airfield was most certainly the Watch Office. I've been after photos of the building for ages now and as far as I can tell it was demolished around 1986 after I started my research. I have however found three published references that you may find of use that show the building. These are 'From Hull, Hell & Halifax' by Chris Blanchett ISBN 0904597814 page 207. 'Failed To Return' by Bill Norman ISBN 0850524741 page 147. 'The Military Airfields Of Great Britain - Northern England' by Ken Delve ISBN 1861268092 page 11.
As far as I can tell from these the Watch Office was a Bomber Satellite Type B to AM Drawing No. 13079/41 with Phase 2 modifications and local adjustments.
The plans I got from RAF Hendon are incomplete and only show later airfield construction, though the Watch Office is shown, no building plan info is contained on these, however the plans confirm the shape and surrounding buildings.
There was no Battle Headquarters shown on the plans, but the Operations Block still exists. There is also a very nice example of a local design Defence Position which I hope does not attract the same fate as many of the other buildings!
I'm drawing the plans onto Google Earth at the moment and will send you the link if you like, it will help with your walks around the sites.
I'm also hoping to publish a report of some sorts soon which will not only contain the site history but also the unit history. I'm researching one particular aircraft and crew at the moment, that of Lancaster B11 DS830 'Bobby Boy' & PO T Spinks DFC of 432 Sqn RCAF that were based at East Moor.
I have loads of photos of the airfield from the past couple of years, if you like I can send you copies. I've yet to work out how to get them on the web. I'd recommend in the meantime going to Chris's site which has some great pics's on there of East Moor.
I would also be interested in any pic's or info you might have and especially to Paul, I would be very interested in seeing his photos of East Moor from the 1980's as it may help to further unlock the mysteries of the Watch Office and other buildings that have long since gone.
In the meantime you may like to pick up Brian Shields book 'The East Moor Experience' ISBN 1900604019. I know this is available at the Yorkshire Air Museum at Elvington. Its an interesting book that takes the form of a diary account of the airfield from 1942 - 1946. There is a lot of info in it and well worth the £15.
Hope this has been of help and I look forward to seeing those pictures or hearing anything else about this airfield.