We've been overwhelmed by your messages of support. They have come from all over the world, but particularly from the United States and, of course, Spain, which suffered similar terrorist attacks last year.
As our media site reports today, we had more visitors yesterday from Madrid than any other city in the world, outside London itself.
Here is a representative sample of the emails we've been sent in the last 24 hours, to follow up on those we published yesterday.
Pedro Moreno, Madrid:
"I have no words. Be strong, this is too much. We know what you are feeling. We would like to help you."
Alicia Lorente, Barcelona:
"As a Spaniard who lived very closely to the March 11th attacks in Madrid, I wish to express my solidarity to all Londoners who have experienced today the unjustified terrorist attacks that some heartless fanatics had carefully planned for a day which should have been plenty of joy and pride for all U.K. people.
"Be strong and keep fighting against fanaticism worldwide."
Joan Slavin, New York City, USA:
"I remember 9/11 here in New York City. When I heard [about yesterday's attacks], I thought back to 9/11 and the pain I went through living in Manhattan at that time. London, like New York, is a wonderful, all inclusive city where people of many races live together in relative harmony. I lived in London for three months several years ago and remember remarking to friends how similar the city was to New York in that it was a truly international place where everyone is accepted for who they are.
"Last week on the subway, I met a group of students who came to New York to study this very point... to see with their own eyes a city where all people can come together to live and work. These cities are models for the world. I can not even begin to understand why someone would bring such pain to these places. God or Allah or whatever you choose to call our creator must be wondering right now when we are ever going to understand."
Jose Cabal, Northern Spain:
"As someone who was living in London for more than two years I feel these blasts as something that happen in a place that I consider my second country, and specially today, with the Olympics celebration taken place just a few hours ago, I am deeply sorry for all this. Please accept my condolences and all my support."
Laura Benigni, Italy:
"I lived in London. I found myself in tears as soon as I heard the news while driving on the highway from Umbria to Rome. I feel devastated, helpless. I discovered that I miss London so much that is the place where I want to be now!
Elizabeth McGlynn, Vienna:
I was born in London and work in Vienna right now. Awful hearing the news in the car whilst driving up the hills of the Viennese Woods on my way home. My way home - and to work - in London in the last few years was over Tavistock Square, Kings Cross or Liverpool Street. Every gut feeling in me is tearing toward London now, to see my friends and give and take a hug and a cry."
Miguel Flores-Bernés, Mexico:
"From Mexico, our thoughts and prayers go to all the British People on these terrible moments. All the countries in the world should unite in the battle against terrorism. I had the wonderful opportunity to study one year in Britain and I know the UK will carry on, grow stronger and prevail over these tragic events.
"Un abrazo desde Mexico a nuestros amigos británicos."
Anjalika Sagar, London
"This is sad and horrific - my thoughts are with all the families of those killed or injured .....
"I hope however that this does not spark off revenge attacks on our fellow Muslim citizens here in London - that would be pointless. The press must educate the British public into the difference between Arab extremists and Muslim British Citizens who are members of a larger South Asian Diaspora."
Patricia Rico Martin, Madrid:
"We Spanish want to join all of you in this sad day. Unfortunately we know how it feels to go through a situation like that. It is necessary to help each other and stick together against terrorism.
Michael Weaver, Canada:
"As one who spent my first 8 months in London before coming to Canada with my English mum, to be followed by Canadian dad in August after WWII, as well as having my son visit London 2 weeks ago for a week, my heart goes out to all Londoners affected by this terrorist act.
"Mum has told stories of being a roof-top fire watcher (she was a telephone operator during WWII) and I know that the British resolve will endure through this tragedy.
"Our prayers and deepest wishes go to all involved, with the hope that this is just another bump in the road before the world can live in peace.
Patty Wilson, Texas, USA:
"I would like to express my outrage to the people of London at the cowardly attack that was perpetrated against them this morning. I know that they will not let these terrorist overcome the British spirit and resolve. Never forget that America is an ally and that we will stand shoulder-to-shoulder with you in this war of terror that attacks innocent civilians.
"To the people that have lost loved ones I offer my deepest sympathy and will be praying for the recovery of those so badly injured. God Bless Britain. God Bless America."
Diana Walsh, California, USA
"Yesterday we celebrated when your fair city was named to host the 2012 Olympics, which stands for some of our best human attributes. This morning I was shocked, then saddened, and then outraged to hear that London had been attacked and her innocent civilians terrorised. I have been to London and know what a great city it is and how warm and welcoming your people are. Know that today we are all Londoners. Peace be with you.
Karen Blair, USA:
"To all the good folks in London, hang in there please, my thoughts and prayers are with you. You will get through this horrendous experience, as many of you already know and are saying (as I read online news accounts). But there is some trauma to deal with in the meantime, so please just know that so many of us 'across the pond' are thinking of you today and sending you our love and support.
"These attacks make no sense to sensible folks. I think it was the late Iraq envoy Sergio Vieira de Mello who once said that efforts to make the world more humane and peaceful might not make this world a heaven, but it will prevent the world from becoming a hell.
Jesus Quintero, Mexico City, Mexico:
"I love London people. It's the best place on Earth. My heart is with you."