Also says, lot of blame to be shared around, by Boris Johnson and Jeremy Corbyn
Sterling fell almost 1% to a 12-week low of 137.24 yen
Brussels saw May's letter as a shift away from London's stance of 'we want our cake and eat it'
EU Brexit guidelines focus on phased approach, rights, benefits, transitional arrangements
Steep fall in the value of pound has changed merger calculations for companies around the world
She also flagged the importance of 'the closest possible security cooperation' after Brexit
Transitional period to work out trade deal after Britain leaves the EU to be limited to 3 years
The clearest lesson of all is that the European mainland has been essential to Britain's prosperity
Now that Article 50 has been triggered, Tusk is calling a European Council meeting on April 29
Many have been surprised by how successfully EU 27 have managed to maintain a united front so far
UK govt will approach negotiations from a much more settled political and economic condition than EU
The debate has moved on to what Brexit will look like - but money continues to be a key theme
Brexit decision serves as a historic and stinging rebuke to proponents of a unified Europe
UK PM Theresa May interpreted last year's vote for Brexit as a call to clamp down on immigration
Said UK aims to establish free trade deals with countries beyond Europe, impose immigration limits
UK government says it wants to carry out both separation and trade talks at the same time
It sets the clock for two-year negotiation process for Britain's relationship with EU as non-member
The head of the $335 billion QIA sovereign wealth fund said he saw opportunities in Britain
May said she is prepared to walk away from talks with no deal if only bad terms are offered
Britain now formally annot sign trade agreements while it remains a member of the European Union