Does this mean UKTV have officially 'lost' the rights to the classic series?
Would BBC Four be able to afford both Dr Who & TOTP reruns?
I doubt UKTV ever had exclusivity. BBC Two showed a few serials c.1999 and BBC Four did in the mid-00s, when UK Gold and UKTV Drama were showing them respectively.
Sci-Fi Channel showed some of the UKTV omnibus edits last year over the Easter break (bizarrely as "Sci-Fi Movies"), just before the channel became Syfy.
Repeats of Doctor Who and Top of the Pops are incredibly cheap, but it's not BBC Four's remit to provide constant repeats.