What's the best value tax reporting solution (UK)?

I've got accounts with various exchanges and I did a bit of very low level mining with Nicehash back in the day. I currently DCA in weekly and I haven't taken any profit yet, but that may change soon. I'm looking for a service where I can connect my exchanges via API, pull in transaction details and generate tax reports to be used in Self Assessment. There seem to be a load of options with varying prices depending on the number of transactions and I'm looking for advice on which is best. The mining generated a load of very small transactions, so services that charge a lot for more transactions might be worth avoiding. Obviously I'm keen to minimise my costs (in order to maximise my profits).

What are you all using, and what do you recommend?