What candidates and events from each series are your main keywords for distinguishing each series from the others.what to you makes each series unique and different in its own way?

Series 1 - Saira,tottenham hotspurs,Adele,secret signals,Miriam

Series 2 Syed,The Badger, 100 chickens, lots of crying

Series 3 - First on BBC1,Jadine,Tre,Katie Hopkins,Selling cheese to the french,Shopping channel task,london zoo, 'i AM your boss'

Series 4 - Kosher chicken,'Its my birthday today Sir Alan',Raef,Lucinda,'i dine with prince or pauper',sophocles

Series 5 - Last to feature Margaret,Pantsman,Yasmina, Debra,cedarwood and sandalwood

Series 6 - 'was the one with Stella and Liz'

Series7 - 'Was the one with Susan and Jim'

Series 8 - 'Was the one with that blonde girl Katie'

Minor variations on the OP:

s1 -- wolf jacket
...
s3 -- tits and fish
...
s7 -- Susan and Jim and Helen and Tom; do the French like their children?
s8 -- Ricky Martin and the "best ever business plan"

tbh, I'm struggling to remember very much at all about the last series.

Series 6 - Stuart Baggs the Brand, Field of ponies, 'it was shameful' (Raleigh).

Series 7 - Top Hat (see below), orange juice, 'footprints on the moon', Dalai Lama, gloves

http://www.youtube.com/watch?v=83jB3T5EZSo