A flight deck visit won't be too much of a problem I don't think.
Routing from Southampton to Alicante normally takes you down central France, over the Pyrenees then down the east coast of Spain towards Valencia then approaching towards the east (normally easterly wind in Alicante).
Routing flying back normally goes towards Albecete then towards Madrid towards Bilbao, over the Bay Of Biscay then short distance to Southampton.
I fly to Alicante quite a bit, flying alongside the east coast of Spain and Pyrenees provide great views indeed!
Enjoy your flights!
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