right now Kim gets a lot of attention and respect from the BBC, including Sue Barker. Her simplicity plus the fact she is very approachable is genuinely liked by the journalists. Furthermore, she is a comeback player and that is something the British like.
Add to this she just won Eastbourne, the fact she is Lleyton ex, etcetera, and you understand she is big in the UK right now. Today they give her 20 minutes of airtime (interviews and so on)
No wonder they picked her for center court.