The police investigate all breaches of TPims and will prosecute where that is viable.

BBC: Terror suspect first to be charged under new TPim law

In March it was revealed nine British citizens were subject to TPims.

BBC: Ibrahim Magag

Ten men - nine of whom are British - are currently subject to TPims, which places a raft of restrictions on what they can do.

BBC: TPims: Terror watchdog urges higher standard of proof

Labour has argued that TPims have "weakened" public protection against terrorism.

BBC: Terror suspect first to be charged under new TPim law

The independent reviewer has also challenged the new two-year-limit on TPims - a restriction that wasn't part of the previous control order regime scrapped at the start of 2012.

BBC: TPims: Terror watchdog urges higher standard of proof

For Labour, shadow home secretary Yvette Cooper said it was clear that the security services and police were concerned about the operation of TPims and the possible impact on UK security.

BBC: Police 'not ready for new counter-terror powers'

He added the end of relocation powers had been balanced by increased resources for surveillance, and TPims were limited to two years as opposed to the indefinite length of control orders.

BBC: Labour questions TPims as terror suspect absconds

In March, the independent reviewer of terror laws, David Anderson, said TPims could prove less effective than control orders because they can be imposed for a maximum period of two years only.

BBC: Terror suspect first to be charged under new TPim law

TPims replaced control orders in January 2012.

BBC: Terror suspect first to be charged under new TPim law

The names of most of the men who are subject to TPims have not been made public - but Mr Anderson said the Home Office should supply "information regarding the location of T-Pim subjects" on a region-by-region basis.

BBC: TPims: Terror watchdog urges higher standard of proof