Actually not quite right...
C&N Touristic (owned by amongst others Lufthansa), who is the Tour Ops of condor, bought Thomas Cook (UK). (i.e. the other way round !)
They decided that Thomas Cook was such a good international brand to change C&N to Thomas Cook AG. They are rebranding all airlines to Thomas Cook as well. This includes jmc in the uk, Condor in Germany, and Sun Express in Turkey. It will be the largest charter airline brand in europe.
The aircraft you saw will have been an ex cale and ex jmc one. After the collapse in belgium a year ago, TCAG sent aircraft to rescue their passengers who were on Citybird (was it ?). These were mostly jmc aircraft. In march this year a new airline was launched in Belgium, Thomas Cook Airlines Belgium using 5 A320's that became available in the group due to jmc downsizing by 5 busses. These were repainted and the plan is to re-register them, but some are still on the british reg.
Have a look on
www.!!!!!!!!!!!!!! for Thomas Cook Belgium and Thomas Cook (condor) colours. jmc start painting the aircraft next month, and Thomas Cook Airlines Europe is launched at the end of next march.