The Duke of Cambridge will host his first investiture ceremony today as the scope of his royal duties widens.

William will present awards to recipients from across the UK, including OBEs to Wimbledon champion Andy Murray and Vicar Of Dibley producer Jon Plowman and an MBE to presenter Aled Jones.

The Duke has recently given up operational duties with the RAF after serving three years as a search and rescue helicopter pilot in North Wales.

He is now in a "transitional" year, sources have said, and is considering options for his "public service".

But with his grandmother the Queen and grandfather the Duke of Edinburgh advancing in years, there is speculation that William may take on extra responsibilities.

Murray was awarded the OBE in the New Year Honour's, before his historic triumph at SW19, after winning the US Open and men's tennis final at London 2012.

He beat Novak Djokovic to become the first British man in 77 years to win the singles title at Wimbledon.

TV host Jones has been recognised with an MBE, for services to music, broadcasting and charity.

The former teenage choirboy, who now fronts morning show Daybreak, found fame at the age of 12 with his top five hit Walking In The Air, which was written for the animated movie The Snowman.

Plowman served as the BBC's head of comedy for 10 years, producing classics like Absolutely Fabulous, French And Saunders, Vicar Of Dibley, Little Britain and The Office.

He was also an executive producer of the Olympic satire Twenty Twelve, which won a Bafta award.

The Queen hosts the large majority of investitures but shares the role with the Prince of Wales and the Princess Royal.

Around 25 investitures are held each year, with most staged in the Ballroom at Buckingham Palace, but others take place at the Palace of Holyroodhouse in Edinburgh and at Windsor Castle.

It is likely the Duke has been practising for the event as whoever presides over the ceremony has to ''dub'' new knights with a sword, pin awards on the recipients and know something about each person being honoured.

William already carries out a number of royal engagements in support of his charitable interests and those of the Royal Foundation he is joint patron of with wife Kate and Prince Harry.