You can take up the Strathclyde course. You dont have to be worried about the BPS because it values only when you are planning to enter core psychology BSc programs and later study professional programs in psychology.
However as you are planning to do business honors with Psychology, this is never an issue. The key to win a PhD is
1. Get a first class distinction from a top ranked uni
2. Again a distinction in your MSc from a top ranked uni
3. If possible publish one paper during your MSc in a leading international journal
4. If possible present one or two papers at a conference
5. Write a strong and convincing research proposal
Only these matters for getting a funded PhD place and nothing else. For now, keep these unis in option in the following order.
If applying for Psychology with minor in Business and management:
Edinburgh
Glasgow
St Andrews
Strathclyde
If applying for business and management with psychology as minors
Strathclyde
Edinburgh
Glasgow
St Andrews
I wont appreciate applying to any other unis in Scotland other than the four mentioned above.
I understand you have facilities with accommodation in Scotland but why don't you stretch for a uni outside Scotland. You could apply to other top unis like Bristol, Nottingham, UCL, Warwick, KCL, Birmingham, Manchester, Sheffield. You could probably select the fifth choice from the list above.
I think you can move in your ug from one uni to another so its always possible to get transferred. Regarding the distance between Edinburgh and Glasgow, its almost one hour on train. So its practically not possible to travel everyday from Glasgow to Edinburgh.
If you really want to stay only within Glasgow, Uni of Glasgow and Strathclyde are the only two options you will have in hand. Hope this helps.