We recommend either:

1) Chill in Biarritz for a few days

We'll arrange a taxi for you back to Biarritz where you can chill and relax for a few days. From Biarritz you can either fly back to London with RyanAir, or take a 5 hour train ride back up to Paris where you can relax!

Or

2) Chill in Paris for a few days

You can either fly from Bilbao or train up to Paris and relax for a few days in the city of lights. We recommend that you take the train journey as it's relaxing and only five hours.

Or

3) Chill in Barcelona for a few days

If you did this option, you could either fly into Barcelona and take the 6 hour relaxing train to Pamplona, or you could fly into Bilbao from Barcelona.

Or

4) Chill in London for a few days

Fly from Bilbao and relax in London for a few days.

All excellent options!