I think a party with those policies in a General Election setting would basically guarantee a Labour government.
From 2010 - 2017 we saw a pattern of voter migration in the non-metropolitan North and Midlands from Labour to UKIP in the 2015 election and from UKIP to Tory in 2017. I'd therefore argue that the reactionary right has already largely abandoned Labour and that the impact on their vote-share from the rise of the right has already happened. The vast majority of people who would support the policy platform above were Tory voters in 2017, and in the marginals a decent proportion of them have no partisan allegiance to the Tories, having only voted for them in 2017 as they were the most Brexit-y option.
On that basis, I think an organised Farage-led populist party would hit the Tories a lot harder than it would hit Labour.