The poll also suggests people are now more likely to believe the PM has a clear Brexit plan – although they remain divided.
A narrow majority of the public support the UK leaving the EU single market, according to a new Sky Data poll.
In her much-anticipated speech on Brexit, Theresa May said the Government’s plans for negotiating .
Having been informed of the Prime Minister’s stance, 51% of those surveyed said they support leaving the single market, while 39% oppose such a move.
Some 4% answered “neither” and 6% said they did not know which they’d prefer.
There is a stark divide in opinion across different age groups, with 51% of 18-34s opposed to ending the UK’s single market membership, against 34% supporting it.
In contrast, 63% of those aged 55+ support the Prime Minister’s move, while 29% oppose it.
The poll reveals that people are now more likely to believe the Prime Minister has a clear plan for what Brexit should mean for Britain – though they remain divided on the subject.
Some 44% think she has a clear plan, up 10 percentage points since the question was last asked in October. Meanwhile 42% think she has not got a clear Brexit strategy, down seven points.
Just over half (51%) now trust Mrs May to get the best possible deal in negotiations with the EU, up five points since October, while the proportion who do not trust her is down three points to 36%.
In addition to differences by age, there are also sharp divisions in opinion by region.
Londoners oppose exiting the EU single market (52% to 33%), are unconvinced that Mrs May has a clear plan (58% to 30%) and do not trust her to get the best possible Brexit deal (48% to 31%) – all in stark contrast to the rest of the UK.
:: Sky Data interviewed a nationally representative sample of 1,068 Sky customers by SMS on 17 January 2017. Data are weighted to the profile of the population.