A good place to start is via Gov.uk’s pension finder. Compare the fees and see what funds they are invested in. If you don’t like the funds see if they can be shifted to one that better meets your Rebel needs. The easiest path is usually to take the free employer money in their default scheme. Transfer out occasionally if they will allow. Consider consolidating them into your low-fee SIPP if they are expensive.
Tip: Always TRANSFER. Prioritize the worst offenders first. 
👉 Week 8 looks at the best providers to look after your money.