I would say that there should be no problem, provided the employer is happy to contribute into both schemes of course.

There shouldn't be any tax implications for you, and since the changes came into force I understand there is no maximum amount that you as an employee can contribute.

It would be a good idea to speak to an independent financial advisor, but my (very personal) opinion is that not so many are 'independent'. You may well have to pay for this service. A decent accountant with payroll / pension experience may be able to help.

In addition to this try contacting the people running the pension schemes, they should be able to give you a definitive answer.

My answer is given as someone studying accountancy & payroll, but I'm only in my first year so I am by no means an expert.

Good luck.

John