Hi, I am also travelling from NCL-TFS, in July. I was initially quoted AV8 in both directions but this has since changed. Excel are now doing most of AV8's destinations from Newcastle this summer, although AV8 will have a 'w' flight from Tenerife on Friday evenings. STA 1755, STD 1900.
AV8 operate a 757-200 (G-OAVB), which is an ex. Air 2000 machine. I dont know much as far as crews etc; try using the search facility to find threads on AV8.
Just out of interest what dates are you travelling?, did you say your return flight was via Manchester?