They are interested in the amount of poultry - over 50 and you need to be registered. they will want to see that you do not wash eggs (maybe make sure your nest boxes look pristine so that you obviously would never have to bother wiping poo of an egg), and that where you sell them is in a cool, shaded position. you might want to explain how you sell in hot conditions (ie: restricted to times of the day, early mornings and evenings, door sales etc). Food storage needs to be fairly secure and rodent free and separated.
keep your records up to date, movements and medicines.
My local Trading Standards people wanted ALL pigs tagged (obviously wrong, fir the young ones) yet animal health couldn't care less about any aged pig whilst the pigs were on my land. If they moved, that was a different matter altogether.
If you talk about your pigs, the ones you raised in the past, they might ask you about what you did with your meat. was it sold, were you registered etc, etc.