Deputy Prime Minister Nick Clegg says he wants to see arms licences to Israel suspended after the country "overstepped the mark" in its attacks on Gaza.
The Liberal Democrats leader said he shared Baroness Warsi's "concerns" over Britain's relations with Israel and said such licences should be halted pending an existing review of whether they should be revoked more permanently in future.
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The operation to recover the unexploded bomb near the Houses of Parliament let to disruption in central London overnight.
Southern parts of England and Wales will see sunny skies after a frosty start.
A police spokesman said the incident in the Bourke Street Mall on Friday was not related to terrorism.