I'm assuming your pension holder gives you some choice on where the fund is invested.
Have a look at the Moneysupermarket .com forum. They have some savvy people on there, one or two are IFA's and will give you a straight answer.
Or several. One option would be a short annual check by an IFA just to give a sanity opinion for a flat fee.
I don't know of any advantage to amalgamation, I had about 4 pensions at one point, no drama.
Most of what IFAs do of course is set out that it's all a risk, and assess your willingness by using their incalculable wisdom - via half a dozen questions!
With my hindsight I could easily say go for Global, Dynamic , Accumulation funds. Dynamic means riskier but if you look at a multi-asset fund (they will be unless specified), the fund manager will shift the investments over time to avoid obvious bad ones (war zones etc). Those outperform the average over time. If you look, at eg Hargeaves Lansdown where they have a good graph-drawer to compare 5 years. You can split the investment of your fund, don't forget, even if it's with the same company. Near the end of your working life you move towards more conservative funds so you don't get caught if the worst happens.
Here's some HL graphs. Ftse100 is in blue, the middle ones are Global Dynamic, and the grey flattish one is Global Cautious.
I've had money in US
Index funds for the last few years - that's the yellow one. That's the sort of strategic decision you can afford to take and review, pretty infrequently. IFA stuff.
Yes it drops more when there's a drop, but it comes back higher, again and again.
View attachment 249154
That's only 5 years, and through the slings an arrows of outrageous US presidents. Extrapolate.
Now imagine the line, which over time would go off the top of your computer, representing the performance of the bleedin obvious - microsoft, amazon etc.
If in Aug '17 you'd put 10k in, your standard UK index tracker blue would be at +1.5k.
If you'd put
just 1k in microsamazoogle, which may be too granular for a pension pot direction,
that 1k would have gone up to MANY thousands. Extrapolate to 20 years.
Some of those co's are here, this is just a screenshot of biggest co's. Those are Annualised Growth Rates.
MS's 31% over the last 10 years is 1488%.
View attachment 249163
SO when someone says "use a tracker, you won't beat it", hesitate.
Think electric cars, mobile internet access, IoT data collection - they need 5G. Over to you and good luck.