<div><span style="font-size: 1rem;">Liz Truss is the new UK prime minister after being appointed by the Queen at Balmoral Castle, reports BBC.</span><br></div><div><br></div><div>Boris Johnson earlier tendered his resignation to the monarch.</div><div><br></div><div>Johnson and Truss travelled separately to Balmoral Castle in Aberdeenshire for the handover of power.</div><div><br></div><div>This morning Johnson bid farewell in a speech outside No 10 Downing Street, calling himself "a booster rocket" that had "fulfilled its function".</div><div><br></div><div>"This is it, folks", he said as he defended his record and called on the Conservative Party to unite behind Truss.</div><div><br></div><div>Later this afternoon, Truss will address the nation at Downing Street and is expected to start naming her cabinet.</div><div><br></div><div>She is under pressure to announce an immediate plan to tackle spiralling energy costs.</div><div><br></div><div>The BBC understand that household bills could be frozen at their current level for about 18 months - covering this winter and next.</div><div><br></div><div>A rare glimpse into the practicalities of how power is handed over - historian</div><div><br></div><div>Robert Lacey, royal historian and biographer, tells BBC News many will consider that it was appropriate that the new prime minister travelled to Balmoral to be appointed.</div><div><br></div><div>"Many people would feel that's how it should be - not just out of respect for the Queen, but just to remind us, this is a political person going up to be given a greater job, as head of the British government."</div><div><br></div><div>"Nothing ever gets leaked" by the palace regarding the audience held between the Queen and her prime ministers, he adds, however "indiscreet" politicians may "drop hints about what's been said".</div><div><br></div><div>"The ceremony we are seeing today is an important reminder that Britain has two heads of public life at any time: the elected head - the prime minister... and the monarchy," says Lacey</div><div><br></div><div>"This is a rare glimpse of some of the practicalities of how that operates."</div><div><br></div><div>How is the Queen?</div><div><br></div><div>Sean Coughlan</div><div><br></div><div>BBC News, royal correspondent</div><div><br></div><div>There have been worries about the Queen’s health, but the official photos show her on her feet and smiling as she shakes hands with the new Prime Minister Liz Truss.</div><div><br></div><div>She’s wearing tartan in keeping with the Scottish setting and a rather autumnal cardigan, in keeping with the lit fire. In a change of venue prompted by concerns about the mobility of the 96-year-old monarch, the meeting took place in Balmoral Castle.</div><div><br></div><div>The historic moment was recorded in still photographs, rather than video, which might limit the clues about her well-being, as the new prime minister moves to where the Queen is standing.</div><div><br></div><div>The Queen did not appear at the Braemar Highland Games last week, usually one of her favourite events, and there had been some trepidation about her health.</div><div><br></div><div>But with a walking stick in hand, the Queen was clearly determined to carry out her constitutional role in the appointment of the 15th prime minister of her reign.</div><div><br></div><div>bnbd24/fas</div>