OSMC and Pi TV Hat not playing nicely with TVheadend

So I installed OSMC on a Raspberry pi 3B+ and attatched an official tv tuner hat to the Pi.

On OSMC I enabled TV headend and installed the backend software following this guide

But when I come to set up TVHeadend it will find my tuner, it will find the muxes but won’t find any services. - I’ve played around with the settings on the Muxes and tried to look up the muxes online to see if they are set up correctly (my local transmitter is Brierley Hill in the UK)… Not one single channel will come up.

Can anyone give me any help to solve this please?

Check your signal and also check [HowTo] Retune TVHeadend DVB for UK Freeview digital switchover