• In the 18th century the old Rubble Barn was built.
• On 31st October 1836, a Deed of Exchange was made between the Reverend John James (of the 1st part), the Bishop of Peterborough (of the 2nd and 3rd parts) and John Hames (of the 4th part).
• On 19th September 1938, a Compensation agreement was made between the Ecclesiastical Commissioners for England of the 1st part and Leonard Ernest William Bosley of the other part.
• On 29th October 1938, a statutory declaration of Frederick George Bradshaw was made.
• On 18th November 1938, a Conveyance was made between the Leonard Ernest William Bosley of the 1st part of the Governors of the Bounty of Queen Anne of the 2nd part and the Vendors of the 3rd part.
• On 17th November 1939, a Conveyance was made between the Peterborough Provincial Benefit Building Society and The Trustees. These were Betty May Holmes (Wife of Edward Arthur Holmes), Galdys Mary Clapham, William Marshall (MB, CHB), Thomas Francis Sewell (Engineer's Estimator), Frederick James Ward (Railway Engine Driver) and John William Fowler (Company Director of the Trustees of the Peterborough Centre of the St John Ambulance Association).
• On 17th November 1939, Peterborough Provincial Benefit Building Society sold the freehold land for £1,000 to the Trustees. The Trustees paid for it with the funds of the St Johns Ambulance Association.
• In the 19th century alterations were made to the barn.
• In the 20th century the St Johns Ambulance made it their Headquarters in Peterborough.

Architecture:

The premises now occupied as St Johns Ambulance's headquarters, was originally a rubble barn in the 18th century. It was much altered in the early 19th Century and in modern times.

The building has a steep stone slate roof, stone verges and 1 modern brick chimney.

There are stone quoins on the 1st floor and on the ground, brick quoins.

To the rear of the building on the 1st floor, there are two 19th century hung sash glazed bar windows supported by wood lintels.

The ground floor has a long lintel to a former opening and is now occupied by a small window. There are modern windows to the side gable ends of the building.

In the 19th Century, the front facade was rebuilt and the brick painted. The 1st floor had 4 windows, 2 with round and 2 with pointed arches. On the ground floor, the glazing on the windows gives it a gothic feeling.

A flat-arched carriage entry is now used for the ambulances and the entrances are 3 modern doors enclosed in round-arched doorways.

A modern extension exists to the left of the building backed with a bit of old walling. In the interior there remains some original beamed ceilings.

The old Rubble barn was listed as a Grade II listed building on 7th May 1973.

The area used was a piece of freehold land at the Northern part of the garden to the old St John Vicarage in Priestgate. It had an exit to Cowgate and also included an old barn / warehouse.