Neptuno

I would probably have done that had I had a house in the UK.
I'll probably take extra suitcases with Jet 2, they allow up to 3 x 22 kg bags

steviedeluxe

Hi - one way to go back with several suitcases is to take the train to London - from Barcelona or Girona, although you can also catch the service from Madrid. You can take several suitcases with you - we did this last summer. The only snag is you have to change stations in Paris, but plenty of taxis...
Another suggestion which may help would be to scan documents and then use an internet service like Dropbox to store the scanned info. Then you need only take a small amount of documents with you on a flight, and use a courier for the other docs knowing that you had a back-up.

Neptuno

Its a long way to Barcelona or Madrid, dragging large heavy cases, then changing trains etc. Sounds too much like hard work!
We had considered going by coach, but the 30-40 hour journey sounds arduous abd stressful, and includes a long wait in Paris
We' ve decided to go with Jet2 who allow uo to 3 22 kg suitcases each, though we'll have 3-4.
As for documents, we've so many what with the Spanish obsession with all these photo copies, and their love of bureauracy.
I'll carry the most vital in my hand luggage and remainder in the extra suitcase.