from Steve Ellis (lead singer)'s site...

The band's lifestyle was transformed from the usual diary of club gigs and rehearsals into a whistle-stop routine of TV appearances, media interviews, radio sessions and photo opportunities. Steve laughs: "It was mental, complete madness. Imagine you've got five fellas - I was 17 - who've never seen anything of life. I came straight out of school into an apprenticeship and had to do the band at nights. I was getting about three hours' sleep. Then, all of a sudden, this went off."

The practice of using session musicians on a pop record was commonplace but rarely acknowledged - that is, until the Love Affair appeared live on prime time TV. "We were on Jonathan King's show, Good Evening. He likes notoriety so he says to our bass player on live TV on a Saturday night, 'You didn't play on your record'. We looked at each other: 'No, we didn't'. He said 'But you did sing on it, didn't you?' 'Yeah.' The next thing, it's all over the papers: 'Band admit...'.

"So we got blacklisted from Top Of The Pops. One of the executives used to say, if you want to be on the programme, you have to buy my wife a washing machine as a token gesture of goodwill. We said, bollocks, no! We're in the charts, anyway. We refused so we got banned. There was loads of fuss but we were cocky and 17/18 so we didn't care - as long as we were playing to a good crowd."

JK continues...
I've now got the original footage from the TV show - it's fascinating - I'll put it up on You Tube.
They were at No1 in 1967 with Everlasting Love.