[1] The 4 acres (1.6 ha) site on Penarth Road, Grangetown was developed circa 1972 comprising a five-storey administration block and several large warehouses for sorting the mail.

[2] Letters, packets and parcels are sorted and distributed by lorry to all parts of the United Kingdom.

From September 2014, as one of the UK's top 100 busiest centres, the service was offered 7 days a week, opening on Sunday afternoons.

For example, in May 2001 none of the 110 workers arrived for the early morning shift, after staying away in support of another CWU walkout in Chester, England.

[6] In November 2008 a fire on the main loading bay caused evacuation of 150 workers and disrupted postal services.