Hello sacred heart,
At this point i think imho the best for you is the following:
Make your way to london stansted airport. Timetable for flights to biarritz! sunday flight departs at 12:15 and arrive at 15:05, flight time 1hr 50 min. Spain and france are one hour ahead of uk. Monday to saturday - 12:15 to 15:05 . Timetable will change to an earlier flight at the beginning of april. Price is quite good now if you have firm plan to go ahead and book your ticket. But not to worry, ryanair is always having special promotion.
Take the ryanair flight to biarritz. Make sure your rucksack is a 35l capacity. Other peregrinos have larger rucksack up to 40l as carry-0n. Also make sure your rucksack weight is under 10 kg. don't c
Take a chance with ryanair. Absolutely no walking poles. If you need them, buy it in sjpp. You might be lucky from here on to meet your future camino family.
Once you arrive in biarritz airport, you can link up with some other peregrinos to either share a taxi or a mini-van to sjpp. Or you will need to take a bus to the station and take a train to sjpp. Do not linger on at biarritz airport, go out the front door. There is a bus at the front to go to the station. Don't worry about getting lost at biarritz airport, it is a very small airport. Try to get to bayonne station as quick as possible.
Try to take the 15:03 train from bayonne, you will arrive at sjpp at 16:23, early enough to go to the pilgrim office to pick up a pilgrim passport and get an albergue to stay overnight. The last train from bayonne to sjpp is at 18:10 and will arrive at 19:36. The pilgrim office will remain open until the last train has arrived.
Once settled in, this will also be a good time to meet your fellow walkers. If you have to stay in a private hostel in sjpp, it is a good idea to partake in the enough meal as this the best time to get to know your fellow peregrinos.
As you are planning to split the
camino frances in two parts. I would suggest you take your time and enjoy the camino and come back for the second part to enjoy it even more.
I am sure there are more exprience and veteran peregrinos to offer you better advice. So feel free to ask. My last cf was done in may/june 2012 from sjpp to sdc. And my recent one is the vdlp in february/march from sevilla to santiago. My next camino, hopefully, will be the caminho portugues in march 2014 with some short caminos like camino ingles, ginisterre/muxia.
Sorry the thread is so long.
I wish you good luck in your planning for the cf. buen camino and god bless. Have a happy christmas.