Services that never were continued:
2007:
Kenyan 3 weekly NBO-CDG-MAN with B767-300
Austrian 3 daily VIE with F70
(Not much exciting this year)
2008:
Easyjet planned 3 based A319 with MAD/BFS/SXF amongst routes
FedEx nightly BFS-MAN-STN
Loganair daily DND
LOT 6 weekly WAW
Swiss 4 weekly year round GVA
Volare daily MXP
Qatar 15 weekly A330 to DOH
Air Syhlet 4 weekly VIE with A320 (dodged a bullet there)
2008 was the last year cancelled slots are shown in the reports, it only lists new operators from this point on. The ones listed are only the highlights, but all are viewable in the link below if you are interested and fancy some bedtime reading:
Airport Coordination Limited - Reports/Statistics - Manchester Airport