@stephenw10 OK I just deleted them all and created new ones - now 7 of them are green and 1 is red (100% packet loss) - while this is less than ideal we can live with that in the short term. What I'll do is open a support call with the provider that these tunnels go to and see what they have to say. If we identify issues with pfSense I will likely open up a new thread on this forum and link to it from here.
As for the LAN drops, I think that problem is solved, we've had 2 whole working days now and its been clean. As mentioned we did rather too many changes at once to isolate which one of these might of been the solution, but thems the breaks.
Of course your help has been invaluable so thank you very much for that.