I believe weenie is correct. And if you were able to take the money out the pension you would end up paying heavy tax on it.
Your best option would be to either leave it as it, or transfer it to a SIPP.
You should check the terms of your current pension with Aegon to understand the fees and if it has any particular benefits.
If it is a simple pension with no particular benefits, you could consider transferring it to one you can more easily manage.
However as it’s only a few thousand pounds it’s likely not worth transferring to Freetrade unless you already pay for a plus account. As the fees are fixed
If you were considering transferring the SIPP as it’s a small amount you might want to consider a percentage fee based broker like vanguard. As this may even lower the cost compared to what you’re currently paying.
I assume you’re currently still employed by the government? And you’re not receiving a government job pension but are paying into one?
i don’t think you can transfer your old pension into tour gov defined benefit pension but this might also be something you want to check.
Do not take any action with your pension without understanding what you currently have, costs, and implications of transferring, etc.