City Security (Cardiff) Limited | 7th January 1998 to 25th September 1998 |
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Citifones Limited | 25th September 1998 to 11th November 1998 |
Zigma Telecom Ltd | 11th November 1998 to 30th November 1998 |
Sigma Telecom (Wales) Ltd | 30th November 1998 to 16th November 1999 |