Question to the Home Office:

To ask the Secretary of State for the Home Department, how many residents were accommodated in each asylum reception centre in the UK at the end of 2017.

Asylum seekers who would otherwise be destitute can apply for free accommodation and cash support to cover their essential living needs whilst their cases are considered. If they have an emergency need for accommodation they can ask to be put in initial accommodation whilst their support applications are being processed
Quarterly data, correct as to September 2017, regarding the number of residents in initial accommodation is included in the published statistics, which can be found on data table volume 4 at;
https://www.gov.uk/government/publications/immigration-statistics-july-to-september-2017/list-of-tables#asylum
The Home Office does not publish data for each separate initial accommodation.