Professional working day = fine if you client is nice can result in being expected to work stupid hours for no benefit..
IR35 equipment is an utterly irrelevant point. The real factors are:-
Right of Substitution (I can replace myself with Fred and the client can't complain)
Mutuality of Obligation which means that the client doesn't need to pay if they have no work for you to do regardless of the length of the contract
Where you were last. you can't be a permanent member of staff on Friday and start back in the same desk as a contractor on Monday morning.
IR35 equipment is an utterly irrelevant point. The real factors are:-
Right of Substitution (I can replace myself with Fred and the client can't complain) Mutuality of Obligation which means that the client doesn't need to pay if they have no work for you to do regardless of the length of the contract Where you were last. you can't be a permanent member of staff on Friday and start back in the same desk as a contractor on Monday morning.
Lots of stuff regarding IR35 can be found at http://www.contractoruk.com/ir35/ and http://www.ipse.co.uk as IR35 is why the latter exists...