Bramshill House - Or is it:

Is this Bramshill House and which one of the seated persons is Thomas Barnes? Is he one of the young lads as Thomas was an errand boy in 1851.

The 1861 census shows that Thomas was a 'servant' in Swallowfield - aged 22 - and perhaps this is consistent with the chap with the moustache. The date of this photograph is not known but is not in the early 'carte de viste' format so would not date from the 1850's or 1860's. This photograph was probably taken at the Anchor Brewery in Dorset Road, Stockwell as Thomas lived in nearby Henry Street (later renamed to Cobbett Street).
Bramshill House is reputed to be haunted - allegedly by fourteen ghosts.  One such ghost is the Legend of the Mistletoe Bough which tells of the bride who on her wedding day plays hide and seek and hides in an old chest in the attic and finding herself trapped, suffocates to death.  The story is that she wanders the house to this day looking for someone to release her. Bramshill House was built by Baron Edward La Zouche (1556-1625) and was used as a police college from 1953 to 2013 (and as at 2019 is for sale for 10,000,000).  The current building dates back to 1605 - although some of the original outbuildings have since been demolished. It has not been possible to identify where in the grounds of Bramshill House that this photograph was taken. It is planned to return the building to being a single family residence with ten reception rooms, ten bedrooms, a cinema, gym and disco.