On Friday, Ofgem announced a 10pc rise in the energy price cap on household bills because of a new rise in global energy prices.
Wealth managers who cater for non-dom millionaires have also raised concerns over plans for Labour’s tax proposals.
David Durlacher, international chief executive of Julius Baer, said that an increase in capital gains tax could be the “straw that breaks the camel’s back” for many non-doms.
He said: “The impact of (increasing capital gains tax) on investors would be very material and that would have a very punitive impact.
“For a resident non-dom that could prove the tipping point of whether they left or not.”
Labour has already pledged to beef up the previous Conservative government’s plans to end the UK’s historic non-dom regime.
Mr Durlacher said a significant proportion of the firm’s clients were non-doms and he was at the “coal face of the changes”.
He said the non-dom abolition had not caused an immediate exodus but cautioned the Government that higher capital gains tax and inheritance tax changes could push more wealthy families to flee.
Mr Durlacher said: “The thing that people are most concerned about is not necessarily just what is in the legislation for resident non-doms. It is potentially additional taxes that could come in on top of those.
“There’s a lot of speculation about whether capital gains tax will be increased, or whether inheritance tax will change. Any moves to increase the tax receipts will have a negative impact on a lot of people. For resident non-doms, these sorts of topics could become the straw that breaks the camel’s back.”