Fast cars, mansions and jewellery sales might be about to suffer an unexpected downturn thanks to caution among the super rich and their advisers that fresh tax hikes may be on the way.

The recent rise in the UK's top rate of capital gains tax from 18% to 28% proved more modest than some had feared, but a recent poll suggests advisers are moving their clients away from assets attracting CGT in anticipation of further rises, and encouraging those with CGT-attracting assets to stay put.