Two days will barely give you a taste of London...it's a huge city packed with things to see. If you

I'm looking for feedback about the possibility of splitting the remaining hotels and toronto days between London and Italy. I'm considering traveling by train from Paris to London, or taking a half-day tour of the Normandy beaches then heading to London. From London we'll fly to Rome.
Two days will barely give you a taste of London...it's a huge city packed with things to see. If you want to see Italy London and Paris in 14 days I would pick three locations. For example Rome, London and Paris and split the time evenly. On arrival I would fly immediately to say Rome, then fly to London, the train to Paris and fly home from there to save backtracking.
Doing Paris, London and Rome in 14 days is quick - but not unreasonable - but I wold allow 5 days for London and 4 each for Paris and Rome. IMHO London has more to see than either of th eother cities - and 2 days isn;t enough hotels and toronto to do much at al.
Separately - flying in and out of Paris is a really hotels and toronto bad choice - since you are wasting time circling back. You should fly into London and out of Rome or vice versa. It won't cost any more and will save a lot of time.
Also, if you want to do a day trip from Paris to Normandy hotels and toronto that's hotels and toronto fine - but it's a VERY long day and unless you rent a car you need to organize a tour from ether Caen or Bayeux to the DDay beaches - you really can;t get there by pubic transit.
As the other say, No. London is a HUGE city and just the very VERY most popular sites would take days. If you only have 2 days, (and that would be 2 full days, not a half day on arrival from Paris) count on visiting about 4 or 5 major sites max.
and 4 day is VERY short for a first visit to Paris as well. Not sure what you mean by 'and surrounding area' since 4 days isn't even long enough for the immediate area. Especially when you factor in jetlag at the beginning of your trip.
Thanks for the helpful feedback. We won a free trip to Paris for four days with the stipulation that we can extend our trip to other countries but the airfare will only be free if we fly to and from Paris.
To maximise your time and money arrange for a flight from CDG to your next destination hotels and toronto and put all of your Paris time at the end of your trip - dont split up the Paris time at the beginning and the end or you will increase the time and money spent for transit. Unless you spend all your time in France you will need to likley pay for an additional flight anyways so just extend your incoming flight to your first destination.
You could do Venice, Rome, London, Paris. It will be a cursory trip to all of the cities and you increase your travel costs each time you move, but I would not add any further locations to a 14 day trip (Personally I would pick 2 locations but I like to travel quite slow and get to know an area rather than do cursory visits quickly).
What jamikins and I are talking about is booking another flight a few hours after you arrival at CDG directly on to Rome(or Venice if you prefer) That will get a major chunk of travel out of the way and eliminate having to back track later.
My actual preference would be just London and Paris but 3 destinations would be fine. remember, you lose most of a day every time you move from one city to another. Even if it is just a short flight - there is all the airport advance check in, transfers to/from the airports, checking in to the new hotel. Short train trips (like Paris/London)are better but still eat up about 1/2 a day.
jamikins and janisj - Thanks so much for the helpful advice. I think you both have the right idea about how to maximize 14 days. I'll look further into the itineraries you suggested. This is my parent's first trip to Europe so I want them to see as much as possible, within reason. I know from my travels to Europe that if you cram into too much it can just be exhausting.
If I were you, I'd limit my trip to the Paris and London area with day trips such as Versailles and Salisbury and Bath, etc. Doing too much traveling from place to place takes away from your precious 14 days, and I think that there are enough "different" things hotels and toronto to fill up the time that your parents won't get bored with two countries.
(I realize that this is the Italy forum, but I'm here seeking hotels and toronto advice, hotels and toronto and ran across your post. I have been to Paris(5 days) and London (8 days) and I could easily return to each place for the same amount of time and not get bored).
Also, you don't mention the age of your parents -- big difference hotels and toronto in the energy level of a 50 year old and an 80 year old! An advantage to keeping "home" bases to two cities would be the ability to get an apartment instead of hotel rooms. Much more comfortable for a group.
Would definitely hotels and toronto stick to Paris and London. I love both cities and haven't even scratched the surface of either. Save Italy for another time....you will enjoy the trip more if you aren't on trains for most of it. As far as I am concerned, you could stay in Paris the entire time...there are tons of great day trips from Paris to see a bit more of France. Good luck with it.
Lauratg- Thanks for the feedback. I had the post in Italy, France and UK - so you were in the right place! I agree about too much traveling. It could take away from the experience. My parents are 60 so they'll be in good shape. But even when I was 19 and traveled Europe hotels and toronto for 14 days - I was exhausted. I want my parents to enjoy themselves, not feel out of breath!