As well as being highly amusing, Julian and Sandy were notable for being two camp homosexual characters in mass entertainment at a time when homosexuality was still illegal in the UK, and for the use of Polari or palare in the sketches.
Kenneth Horne would find these two characters usually by looking in a rather risque magazine (which he would insist he bought for innocent reasons). This would lead him, more often than not, to a business in Chelsea starting with the word 'Bona' (palare for 'good'). He would enter by saying: 'Hello, anyone there?' Julian (Hugh Paddick) would answer 'Hello, I'm Julian and this is my friend Sandy.'
Here is a quote from the sketch Bona Law, featuring Julian and Sandy as lawyers. It illustrates the use of double entendre.