Keisha Buchanan, Mutya Buena and Siobhan Donaghy of MKS were spotted on the front row at the Sister by Sibling show at London Fashion Week.
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Maintenance issues blighted HMP Littlehey for months, the Independent Monitoring Board found.
Police believe the child was deliberately targeted.
The Brexit Secretary has also indicated he is still trying to persuade all Cabinet members to back the Chequers compromise on withdrawal aim