Retained pension benefits or benefits in a buy out bond is paid out tax free if you died. If you transfer them into an existing employer scheme, the maximum tax free lump sum is 4 times salary with the remainder being used to purchase an annuity.
Another aspect is charges. A lot of employers pay some/ all of the charges. If you transfer the funds to your own name, you pay the charges.
From an admin point of view, how easy is it to keep track of your benefits. If you they are with a big company, it can be pretty easy to get in contact with the company. If it's a smaller company, they could close or merge and you may lose track of them. Remember, when the policy is part of the group scheme, it's under trust and you need a trustee signature to do anything such as switching funds or maturing the plan.
Steven
http://www.bluewaterfp.ie (www.bluewaterfp.ie)