where to get passport stamp in London

The U.K. is not part of the Schengen zone so you will go through passport control and your passport will be stamped before you get on the train.

perfect, thanks so much, Laura

and on the way back. Remember you MUST check in before 30 minutes before departure or you won't go - in both directions. there is no "chunnel". There is the Channel Tunnel. It is operated by Eurotunnel. The trains are operated by Eurostar. You may well get blank stares in Europe and England using "chunnel".
People will expect you to say Eurostar.

DK ,, for departures I recommend getting to both stations at least 45 minutes ahead of departure, I aim for about an hour, you go through security and it can be busy. And Nigel is telling the truth, not digging at you, they really do not refer to it as the Chunnel, its the Eurostar period. Chunnel is apparently a term coined by our north american press when it was first under construction and never caught on over in Europe,, I used to call it that too so I know why you refer to it like that. Also, in England, do not use the term "fanny pack" it has a completely different meaning there, lol

Oh yes I know about the N.America/British slang differences - I worked with Brits for three years while working on cruise ships.. I didn't make too many mistakes but caught on quickly to the main ones. Like asking for two more beers using your hand with palm out, not palm in ;). As for the "Chunnel", I used it 12 years ago so I know to treat it like an airport (arrive early). I just hope our vacation dates get approved quickly so I can get the £80 round trip price!

DK, in the 12 years since it has moved to St Pancras. Don't go on autopilot to Waterloo. ;-)

Nope, got all the info already, also just dloaded a free London Tube map as well.. Seems when we arrive it's straight south on the Northern line to Charing Cross station to start the touristy stuff at T'gar Square..

Hint - There are two branches of the Northern Line. If you look carefully you will see that to get to Euston where they split you have to go northbound on the Northern Line Bank Branch one stop. You then have to change tunnels in Euston to the Northern Line Charing Cross Branch southbound 5 stops to Charing Cross for Trafalgar Square. Alternatively you could take the Piccadilly Line southbound 3 or 4 stops to Covent Garden or Leicester Square and walk down, or Victoria Line southbound to Oxford Circus and change to the Bakerloo southbound to Charing Cross. Either way you will have to change.

@Nigel...thank you, thank you...for saying it's not the "chunnel"..it's the Eurostar.

When you go through customs, if the customs officer doesn't stamp your passport, just ask! They'll probably smirk, but generally oblige. When I took the Eurostar to London from Paris in 2003, The officer who checked my passport did not stamp it, but I wanted one as well, so I asked. They may have tightened up on stamping in the past 10 years, I don't know.

DK, On your way back to Paris, you'll pass through French Passport Control at London St. Pancras (just after you go through airport-style security). As I recall, they stamped my Passport when I was there last fall. I believe there are restrictions on knife size, so if you have a knife in your luggage you'll have to consider that. The waiting lounge is one floor below track level. There are a few Cafes and shops in that area, but not many. When your train is announced, just walk upstairs and find your assigned seat. You might find it helpful to have a look This Excellent Website as there are good photos and descriptions of the EuroStar. Happy travels!

Ken, you're right about the knives. My wife and I flew from Washington to London, then took the Eurostar to Paris. I had a very nice expensive Kershaw pocket knife in my locked checked bag, but had no trouble at all getting in to the UK. As we checked in at St. Pancras, however, I heard one of the security guards say "I need to search that bag". I got the key from my wife and unlocked the bag, and watched as the security guard pawed through my clothes and came up with my knife. Sesurity Guard: "Sir, why are you carrying a dangerous offensive weapon?"
Me: "Well, first of all I'm not "carrying" it. As you saw, it was in a locked container, and I didn't even have the key for it. My wife had the key. Secondly, it's not a dangerous offensive weapon. It's a tool. I generally take it with my in case I need to use it as a tool, not as a weapon. Lastly, the blade is under 3 inches long, so it conforms to British law relating to knives." SG: "Well, it has a locking blade, so we consider it an offensive weapon. You have the choice of surrendering it here, or I can call the British Transport Police and we can let them decide. I have to tell you now, though, that if they decide to take the knife that they'll most likely take you, too." At that point, I surrendered the knife. I'm sure that it ended up in some security guard's pocket. $55 down the drain.

Morris: Thanks for your story about the knife. I, too, routinely carry a Kershaw knife which not only has a locked blade but also has "assisted" opening which allows one to open it with one hand (it's not a "switchblade"). I will be sure to leave this one behind when I visit London this summer.

Geor... That's exactly the knife I had. All stainless steel, with a 2 7/8 inch blade.
I hope the bugger that took it cuts his hand off with it.

I'm sure that it ended up in some security guard's pocket. It bet it didn't. There are just too many. That knife is completely illegal in the UK. He (she?) is completely right about the BTP response to it. Locking knives are dealt with severely. I speak with knowledge due to my work.