Looking in the ThomasCook website bit, I noticed this in the Astraeus;
Flights from UK
Flight Number
Dates of Travel
Newcastel - Tenerife
TCX6024
06 May - 20 May 2001
Newcastel - Tenerife
TCX6048
30 Oct 2011 Only
Newcastel - Tenerife
TCX6112
21 Oct 2011 Only
Newcastel - Tenerife
TCX6112
28 Oct 2011 Only
Newcastel - Cofu
TCX6026
02 May - 16 May 2011
Where's Newcastel, and 2001 is a long time ago!