The first point to make is that there are certain excluded activities. Lending and investment are excluded. Whether the entity concerned is a bank or a building society, if the activity is excluded, it is excluded. There is therefore a level playing field. Secondly, we are making provision for back-office services. It will be possible for a calculation to be made on the profit that is attributable to back-office functions by applying a 5% mark-up to the cost of those back-office functions. The lower corporation tax rate in Northern Ireland—assuming that it is lower—will apply to that. That will be of benefit to institutions, including building societies, in Northern Ireland.
I would also make the wider point, which has been made by the Northern Ireland Executive on many occasions, that the ability to set corporation tax rates will be good for the Northern Ireland economy. That is why the Northern Ireland Executive want the power. What is good for the Northern Ireland economy will presumably benefit institutions based in Northern Ireland, whether they be credit unions or building societies. That is the case that the Northern Ireland Executive have made to us.
When the Northern Ireland regime was designed, it was focused on trading income for very good reasons. Over the course of the debates in Committee, there has been a wide consensus that it is correct that it is focused on trading income. It would not be consistent with that approach for me to accept the amendment. I therefore urge the hon. Gentleman to withdraw it. If he presses it to the vote, I will advise Government Members to oppose it. I understand the widespread view, which has been articulated strongly this afternoon, on the importance of the credit union sector in Northern Ireland, but accepting the amendment would be a mistaken approach.