Thomas Mair was armed with British-made hollow-point rifle bullets more commonly used to kill vermin when he murdered MP Jo Cox, his trial heard.

A plastic bag found in a holdall when the alleged killer, 53, was arrested was found to contain 25 live .22 calibre rounds, jurors were told.

Twelve of the rounds were lead hollow-point cartridges made by British maker Eley, firearms expert Andre Horne told the Old Bailey trial. The other 13 were made by a German firm.