150k GBP total comp is not especially competitive with a BigCo.
If that is just salary though, it might be competitive in London depending on the rest of the comp package (i.e. about the same again for equity, 20-25% bonus - so total about 300-325k GBP - would be Ok for mid/senior level IME)
If that is just salary though, it might be competitive in London depending on the rest of the comp package (i.e. about the same again for equity, 20-25% bonus - so total about 300-325k GBP - would be Ok for mid/senior level IME)