Suttling House, St James’s Palace.

[Iain...]

Thanks Hanes…

I think I must concentrate on the 41 census indicating Horse Guards and Dover House.
When looking carefully at Google’s Street View, it looks suspiciously like there was a road between Dover House and today’s Cabinet Office.  The Cabinet Office roof adjacent to Dover House does not ‘correspond’ with the remainder of the building.
If so…, could that have been ‘Upper Charles Street.’
https://www.google.be/maps/@51.504119,-0.1289201,127a,35y,90h,45t/data=!3m1!1e3?hl=fr

Also, on the census, it does not say that the canteen was in Upper Charles Street…, that was Eliza Bennett’s address.

In the meantime…, something was obviously demolished and I’d be inclined to say that Dover House itself has not been touched since its construction.   So there must have been another building.
What’s more, looking at the plan of the building, the Dover family lived there and I doubt very much if they’d have shared the building with a canteen of drunken soldiers.

I’ll try and get F Company Scots Guards CO and RQMS to have a look.   I think the RQMS limited his research to Saint James’s.

Thanks All.
…, Iain.

[hanes teulu]

https://howlingpixel.com/wiki/William_Kent

Tab down to the ground floor plan of Horse-guards

Not easy to read but I think I can make out "C C Horse Sutlers, F F Judge Advocate, P Foot Sutlers"

"A = Gateway" and Lockie's 1810 Topography states -
"Adjutant General's Office, Whitehall,is the door on the left, under the arch in the Horse Guards, from Whitehall towards the park" 

[Iain...]

https://howlingpixel.com/wiki/William_Kent

Tab down to the ground floor plan of Horse-guards

Not easy to read but I think I can make out "C C Horse Sutlers, F F Judge Advocate, P Foot Sutlers"

"A = Gateway" and Lockie's 1810 Topography states -
"Adjutant General's Office, Whitehall,is the door on the left, under the arch in the Horse Guards, from Whitehall towards the park"

>>>>>>>>>>>>>>>>>>>>>>>>

Lol..., what can I say except thank you !
Taken from your plan in the URL...
I hope my image below is correct.

In the meantime, I received a message from a friend with the following.
"Archives have something from 1847:
http://discovery.nationalarchives.gov.uk/details/r/C2694328”

Saying that the Saint James's suttling house was an "eyesore." (demolition)
This could very well have been the same thoughts of the powers to be at Horse Guards.

[Iain...]

Lol…
I’m going to have a lot of pleasure telling the Household Cavalry that the Foot Guards (the ‘Tarmac Technicians’) were needed to guard their buildings in days gone by…   

[Iain...]

Just noticed this...
All around the building, the window 'holes' are indicated with supports.   Whereas the door has nothing.

As such, we can be pretty certain that this was the place where the bomb (an unsuccessful incendiary device) was thrown and where Brice was injured.
There must also have been a sentry box nearby..., as Brice thought it was the Guardsman who fired at him. (then had him arreseted to have his musket checked out)

[Iain...]

Hi All…

Firstly, many thanks for all your help.
Just for your interest, I contacted the Household Cavalry Museum and was immediately informed that my plan above was upside-down. 
I felt a right twit !!  Especially after doing so many Trooping of the Colours there…

Anyway, here’s the final research image highlighting the building in white.  This also corresponds nicely with what could very well have been the Officer’s Mess…, where one of the Waterloo Field Officers watched the incident from the window.

Kind ReGuards…, Iain.