So I actually stopped listening to Radio 2 a while back, but giving it a try, I note during Kens usual 11:30 coming up on the JV slot we have the rather good Lewis Macleod playing the part of JV (much like Rob Brydon did Ken Bruce a few years ago). The real JV is on now, not sure if it'll be a full spoof show or just spoof elements.
Should be a good listen, its online, on the BBC Sounds app and on 88 to 91.. hang on.
The Ken Bruce Version for those who don't remember:
BBC Radio 2 - April Fools Jeremy Vine
Meanwhile on 6 Music, they're playing pop music until midnight.
I was taken in by the start of OJ Borg's show just after midnight - a subtly done microphone fade fail.
From the 8 minute mark here: https://www.bbc.co.uk/sounds/play/m000tl41
From the 8 minute mark here: https://www.bbc.co.uk/sounds/play/m000tl41