Over the past 5 years the BBC service certainly does seem to have dumbed down.
It isn't so much moving with the times as pandering to people of low intellect, unsure why this is the case but it is clearly evident on many of their newsfeeds, not so much the main news programs, but a great deal of radio news broadcasts, and channels other than BBC have very odd target audiences.
Radio 1 and BBC 3 for example, do not seem to aim for the young demographic as one might expect, it aims for the low intelligence demographic of all ages, and I considered using the R word but would rather turn my point into a flame fest. Radio 1 however, would usethe word and then spend 20 minutes explaining why using the word is bold or naughty or not-hip. It appears they expect their audience to be idiots rather than young.
Does 1-extra carry news? Can't say I have listened, but if they do I'd love to compare the sister-stations.