Thanks for the update guys, shame to hear Andreas is less active/inviting these days...
To the OP, from Tatenhill you should be alright given the runway length, so get as much fuel as you can, it will give you peace of mind for the crossing.
Regards diversions, do not forget Newtownards in Northern Ireland, it is the closest alternate to Ronaldsway at about 45 nm and it's worth getting a weather report from them if you arrive over a clag ridden island. It's only psychological that it seems further, but is about 30 nm closer than Caernarfon or Blackpool