Curious about Comtemporary RP Accent**

According to John Wells at University College London:

"I do not understand the proposed distinction between Mainstream RP and Contemporary RP (unless the writer thinks, wrongly, that ‘contemporary’ means ‘young’)."

You can read more of what he says about it at: [link]

Whereas according to the British Library's Accents and Dialects of the UK website in their section on London RP, the commentary says:

"Michelle speaks with an accent most of us would immediately associate with a middle-class background. Many of the vowel sounds she uses have a traditional RP ring, but she also uses a number of pronunciations characteristic of contemporary RP. In other words she uses certain features we only encounter among younger speakers."

You can read more about this as well as hear a sample of this accent at: [link]

Make of this juxtaposition what you will...

Hope that helps