I looked at that, and that's £5.69 a jar versus £2.59 on Tiptree's own website. Unfortunately Tiptree paused international sales during the Covid thing and don't seem to have resumed them fully again yet.
If it wasn't for the rapaciousness of the Royal Mail - it costs a fortune to send anything anywhere now - I wouldn't even pause to think, I'd just send you a jar as a gift - still no taxes or duty on small gifts. But, sending a single jar of jam to France from England ought to be cheap as chips - a £2.59, 350g jar of jam from the supermarket would cost £7.80 for surface post to France and would take 3-5 days. By way of contrast I just got my latest consignment of PCBs from China and the postage on that was £2.01 airmail and took 7 days - posting a "small parcel" in the UK to the UK would cost £3.20.
I also suspect that, post Brexit, English food might have a hard time with French customs unless managed by someone who knows the right person to bribe.
Fuck royal mail.... same with the French Post, it's a total ripoff and gets worse and worse every year. They must a hidden agenda of losing any and all customers so they can go bankrupt and fire everybody.. I don't know...
Just clicked here and there on that British Corner website, have answers now.
1) They opened recently a warehouse in Mainland Europe, in the Netherlands, to make it easier admin-wise to sell stuff to continental citizens. So that's why they can sell 'DDP', duty paid. That explains why the jar costs twice the normal price, 5 instead of 2+.
2) Shipping is 5 pounds up to 1kg, 8 pounds up to 2kg, which is the same we get charged by transporters here for local / national destinations. So that's excellent. It gets even better for heavy stuff : up to 30kg, it's only 12 pounds, which is twice cheaper than the normal price.
So my jar of strawberry would therefore cost me 5 + 5pounds, 10 pounds, which is 14 Euros at today's exchange rate. Just checked on-line the price for BOnne Maman strawberry.... 1,20 Euro. So the TipTree will end up 12 times more expensive huuuuu... I will think about it......