Comparing Guide (as per my HB 1000S at this time) with spreadsheet Graham looks like these are new/returned.
Chan 512 – Chilled
Chan 513 – Now Music
Chan 514 – Clubland TV
Chan 515 – AKA
Thanks Barry – searching the history reveals they have all been in the epg a number of times. Not really new, based on track record (pun intended ), how long will they be around this time ?