Matt, if I remember correctly Mr Muddy is correct and waste pesticides produced at domestic premises are exempt.
With regards to the 'Waste Transfer Note', the derogation will allow pesticides to be removed and so long as a full 'log' of how much, where and when, is sent through quarterly. Details of exactly what information is going to be acceptable is not clear at this point but you will not have to submit loads of individual Waste Transfer Notes. There will be a charge of £10 per quarter.
Note that this will get the waste as far as your depot / office waste area; after that any waste w