I think it's also unlikely that the UK will end up neutral on scientific funding overall. There's no fundamental reason it couldn't, of course: as Leave campaig

I think it's also unlikely that the UK will end up neutral on scientific funding overall. There's no fundamental reason it couldn't, of course: as Leave campaigners have argued, leaving the EU research programmes doesn't require a net reduction in funding for UK researchers, since the UK could simply put an equivalent amount of money into its own scientific funding programmes. Those of us in computing, for example, currently get a good portion of our funding from the EU's framework programmes, and another good portion from the UK's own EPSRC. The UK could keep the total level of funding for science/engineering research constant by setting the EPSRC's new funding level to an amount equal to the sum of previous EPSRC funding, plus the funds previously received by UK-based science/engineering researchers from the EU framework programmes. But will the government actually do so? I predict they will not, and that it won't even be close.