You asked:

I would be grateful if you would provide me with information held by your Department relating to the following:

(a) The number of Crown properties in England and Wales owned or operated by your Department;
(b) The identity and location of these Crown properties;
(c) The total number of Government employees has working at these properties.

We said:

Thank you for your request.

We currently own/operate three crown properties. One office in Newport, Wales, an office in Titchfield and a facility in Christchurch. The ONS office in London is leased and is not owned by the crown.

The May 2017 headcount figure for the Newport office is 2044; the Titchfield office is 840; and we have a small team working in our facility.