Boris and Jo Johnson share the family's trademark ultra competitiveness, but in many ways they are very different people.
Jo Johnson will head up the Policy Unit inside Downing Street in a shake-up to inject fresh Tory thinking into Government.
The Transport Secretary says it's "worth upsetting people to build HS2".
The families of three Londoners jailed in Dubai on drug charges are now awaiting the outcome of today's talks between David Cameron and the country's president.
The Prime Minister has promised to raise their case at their Downing Street meeting.
The men say they were tortured by police - a claim denied by the authorities in Dubai.
Ronke Phillips reports.
"The Prime Minister said that the State Visit was amark of the lasting and strategic importance to Britain of our relationshipwith the UAE.
"The two leaders agreed that their relationship had developed significantly in the last year, especially building a deeper and substantive defence partner and significant commercial links.
"They discussed the action that the international community should take on the most pressing issues in the Gulf and wider region, including to address the challenge of Iran's nuclear programme,
to end the appalling and dangerous conflict in Syria, and to bring new momentum to the peace process between Israel and Palestine. They agreed on the need for further support to stabilisation and development in Somalia at the London conference next week.
"They also discussed UK concerns about the treatment of the three British Nationals convicted of drug possession in Dubai.
“The two Leaders agreed to continue close engagement between the two Governments on important issues in the relationship.”
The Prime Minister David Cameron has promised to speak to the President of the United Arab Emirates, who's here on a state visit, about three Londoners who have been jailed in Dubai on drugs offences. There are allegations that the three men were tortured.
David Cameron's pledge to press for a "proper, independent investigation" into reports that three men were tortured while in police custody in Dubai.
David Cameron is calling for an inquiry into the claims three London men were tortured in Dubai. Grant Cameron, Suneet Jeerh and Karl Williams were given four-year sentences for possessing drugs. All three deny the charges.
David Cameron told Daybreak this morning he will press for a "proper independent investigation" into the torture claims. He meets with UAE President Sheikh Al Zahyan on the second day of his official state visit to the UK.
The case of 3 London men who say they were tortured by police in Dubai before they were jailed for drugs offences will be discussed by David Cameron today.
The Prime Minister welcomes UAE President Sheikh Al Zahyan to Downing Street on day 2 of his official state visit to the UK.
The family of an Ilford holidaymaker who died in police custody in Dubai want the Prime Minister to raise the death of their son with the country's president.
David Cameron has already said he'll discuss the case of three Londoners who say they were tortured by police there, during the state visit.
Queen Elizabeth with the President of the United Arab Emirates, His Highness Sheikh Khalifa bin Zayed Al Nahyan in Windsor, as he begins a State Visit to the UK. The trip comes as three London men were jailed in Dubai for four years each for possessing drugs, amid claims that they were tortured.
During talks with Sheikh Khalifa bin Zayed Al Nahyan at Downing Street tomorrow, Prime Minister David Cameron is expected to address the claims of Grant Cameron, Suneet Jeerh and Karl Williams.
A Foreign Office spokesman said the state visit "will primarily be a chance to develop and strengthen relations between the UK and UAE" but the trio's case would be brought up.
The President of the United Arab Emirates arrives in London today for a two-day state visit. He is being formally greeted by the Queen and the Duke of Edinburgh.
The families of three men jailed for drug possession in Dubai say despite their convictions, they're hopeful they could be pardoned and released within months.
Grant Cameron, Suneet Jeerh and Karl Williams were given four-year sentences for possessing drugs. All three deny the charges.
Their lawyers say they were tortured in prison so haven't had a fair trial.
Simon Harris has the story.