The UK announced on Thursday (22nd October) its (rather long awaited) proposals to update the patent box to make it compliant with the OECD BEPS proposals on amendments to patent/knowledge boxes. The UK proposals set out a series of questions for consultation, with draft legislation to come in December.
tl;dr version: it's more generous that it might have been on grandfathering, but companies had better get their accounting software ready to do some serious work in order to keep track once into the new regime. The added complexities that will be added may well put off companies from claiming.
There are no proposals to include software copyright as qualifying IP, although the BEPS project does permit this – and the Irish knowledge box draft rules, published on the same day, do include software (and the Irish knowledge box offers a 6.25% effective rate. Just in case you wondered).