He was baptized on 25 January in a salon of the New Palace in Belgrade, with the British Minister to the Yugoslav Court, Kennard, representing the godfather King George V, with water from the Vardar and Danube rivers and the Adriatic Sea.

He stayed in the UK throughout World War II and after King Peter was deposed, moving on to Oundle School from 1941 to 1946 and Clare College, Cambridge in 1946–1947.

Yugoslavia was divided to satisfy Italian, Bulgarian, Hungarian and German demands and puppet Croat, Montenegrin and Serb states proclaimed.

[citation needed] After Cambridge, and not being able to return to Yugoslavia following the abolition of the monarchy, Prince Tomislav remained in the UK and devoted himself to fruit growing.

In 1950, he bought a farm at Kirdford, near Petworth, in West Sussex, and subsequently specialized in growing apples, having at one point 17,000 trees on 80 hectares of land.

Peter and Paul Day in the Julian Calendar, the patron saints of the family crypt on Oplenac, where he was buried, in a funeral attended by several thousand mourners.

[citation needed] He was married on 5 June 1957, in Salem, Baden-Württemberg, West Germany, to Princess Margarita of Baden, niece of Prince Philip, Duke of Edinburgh.