One area I've not heard much about is customising reports in IT Planning. Has anyone in Community created their own reports in ITP?

I don't believe the ability exists. I've been publishing our Budgets/Forecasts to Cost Transparency and then building reports within that environment using the data pulled from IT Planning.  TBM Studio offers a lot of great tools for building whatever reports you might need as you'll have a lot more of your organization's data sets available from which to pull from.

Suspect it's not possible in ITP, wondering if anyone has found a sneaky way around  We're more than likely to go down the CT route as we're used to creating reports there.

Hey Julie, haven't found any sneaky workarounds - but that would be cool 

Like @Chuck Krussel, we have also been doing the push to CT and developing custom reports there.  

 Hello,

It is currently not possible to create custom reports in IT Planning, you could bring your data over to CT to enable a bit of reporting on it if you would like.

Kind regards,

Jakob