Hello,
A couple of further considerations, if I may...
Having joined a new employer, and been invited to join their pension scheme, what rules apply in the event that you leave that employment (there are often clawbacks of employer contributions, if you leave the employer within the first 2 years, for example, but this rule is sometimes waived, if you transfer a former pension into the new employer's scheme)?
How do the fees for the previous pensions compare to those for the new employers scheme ?
Are the range of investment options the same, or at least similar, between the previous pension scheme, and the new employers scheme ?
Are you exposed to any costs, or restrictions, if you transfer out of your old fund (I seem to recall that there are some funds applying restrictions on exiting property related investments, for example, but can't recall specific details) ?