Eurostar Trip - bike bag

I am going away for a weekend in January by Eurostar and would like to take my bicycle with me, but you are only allowed to take your bicycle if they are in bike bags.

I am wondering if anyone have and would be kind enough to lend me one? I promise to look after it very well.

Thanks a lot.

I appreciate in advance.

R

Are you just going on a Eurostar to Paris/Lille or are you getting a TGV elsewhere after ?

If Eurostar only you don't need a bag, it's €20 each way to put in luggage coach, if going on TGV you need a bag.