The decision lies with the care provider unfortunately. My advice would be to contact your Mum's social worker if she has one and detail your Mums right to family life as part of the human rights act an see if they can do anything. The care provider shouldn't be aggressive with you, has communication broken down? (might also be worth mentioning that to the social worker too)
Army horses loose on London streets
Last weekend, in Rutland, the first statue in Britain of the late Elizabeth II was unveiled.