Warnings in tests

[AugustT]

The tests run a lot of workflows to test a range of functionality. Not all these workflows are sensible and so warnings are often thrown. This is fine, but does make the test output look a bit messy (lots of 'W's). This bothers the part of me that likes things to be neat and tidy but I wont fix it as it is not a good use of my time. Instead I have created this issue just to highlight that this is a thing that someone could clean up at some point.

[AugustT]

I have knocked off some of these by changing warnings to messages where appropriate