The big changes on pensions from April 2011 is the amount you can put into pensions drop from £255,000 to £50,000. It is only expected to affect around 100,000 people.

there are a lot of information here:
What are the pension changes and how will they affect savers?
SavvyWoman : Money & Retirement : Company Pensions
FT.com / UK / Politics & policy - Higher tax threat to final salary pensions