You'd be surprised.
Many people in the rest of the UK, especially in England, are fed up to hear the Scots whinging on about their lot and about how much better off they'd be not having to share "their" oil with the rest of the nation. They are also fed up with the Scottish Assembly passing all sorts of measures which see their citizens save cash (free prescriptions, free university tuition, etc.) whilst the outrageous "Barnett formula" sees far more cash per capita allocated to the Scots than the English.
There is not much in the Union for England. If anything there should be a referendum on whether England wants to remain part of the UK. At least, for the English, independence would solve the problem of whether the majority of people in the UK should continue to be subject to ever increasing interference from Brussels/Strasbourg.