Television presenter Lizzy Cundy told ITV's Daybreak she "really hopes" regulation is introduced in the cosmetic surgery industry and urged people "to do their homework" before having a procedure.
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Michael Fallon has received reassurances from his US counterpart that security ties with Britain will "endure" following a vote for Brexit.
On Friday, police said it appeared the girl had shot herself in the face with the weapon.
The showers will be slow-moving, heavy and thundery at times, particularly in central and eastern areas.