“I wanted to ask though for a friend not me is there anything you have to pay to environmental health to get a certificate to say you are cleared for doing food prep at home or in premises? My friend is going to be making wedding cakes so also needs to do this course but doesnt know what else there is to pay for with regards health and safety.
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What I know about Environmental Health and food preparation / storage issues is anecdotal only (I've friends who explored the options of making food items at home for resale and also friends / work colleagues who worked in Environmental Health). However, I'd say it could save a lot of heartache, expense and legal troubles if you tell Environmental Health about your plans in advance and ask for their advice.
The friends gave up on the idea of food preparation when they realised they'd have to pay for very expensive and not particularly attractive modifications of their kitchen (modern and well-kept).