And now we enter the space I hate to occupy. I only cycle a tandem because my stoker is disabled. So now, if I can't take a tandem - is that logistical constraints or is it discriminatory?
Does anyone have advice on getting a tandem couriered? It is very possible that 2 Ryanair flights and a freighted bike is cheapest available option. Closely followed by ditching the tandem and buying a new/ better one once at home (morally and environmentally reprehensible/ financially astute according to
ebay).
I looked at this one way for cycling to Istanbul. It seemed to be eye wateringly expensive, and you probably need to box it. Maybe France is cheaper.
KLM website says they will take tandems, though you may need to disassemble somewhat. That could be a good option.
We decided we didn't want to try disassembling and boxing in a foreign city, so instead are doing a slightly shorter route but circular.
As per above if you have a driving licence I think looking at one way hire of a van or estate car (I reckon wheels and guards off your get a tandem in an estate) is likely your best option. If not, consider KLM to return? I've no experience with French trains but would be very doubtful on that front.
Also, try the tandem club for advice, that'll be the best place.