Take one 12-inch long luggage strap, and 6-inches of chain. Use one to fasten the other to the tyre. Repeat eight or twelve times round the wheel. For the sort of distances you might find chains useful for, these will suffice and are a lot cheaper that anything else unless you really want your luggage straps to be black with yellow writing and "that" logo on! You aren't going to ride 900 miles on tiger feet, chains or any other cure-all gimic.
Twenty foot of rope wrapped round the tyre works too up to a point.
Make sure your puncture kit is up to it, chains can result in flats.
For anything over a few miles it's the tyres that count. M&S markings mean what they say BTW, there is a notiacble difference between a M&S and a bog standard knobblie. I've never ridden with studs they are illegal in the UK and probably lethal on the ferry, so not really practical unless you want to change tyres part way.
I did the elefant once on basically slicks and was fine except for foot deep stuff in the main entrance. Another time I tried it on road tyres and turned back 100 miles out after 50 miles of serious fear and three offs. The weather is unpredictable, some years it's a cold road ride others it's real snow. If it's a bad/good one even sidecar outfits with snow tyres turn back.
See you there