No raw eggs. They sugest no runny ones either but I've ignored that.
No rare meat but I've ignored that too. Life's too short to eat well done beef.
No unpasteurised soft or goats cheese or pate - pasteurised versions of either are fine, so vacuum packed pates, jars of meat paste etc will be OK.
No blue cheese.
No Mr Whippy ice cream (but most ice cream is fine).
All these are because of risk of either listeria of toxoplasmosis so your risks will be much lower if you buy stuff from good sources
No liver - risk of too much vitamin A (retinol) poisoning foetus - so therefore no liver pate whether pasteurised or not.
Limit:
Tuna (to two fresh steaks of three cans a week, which is a lot IMO)
Caffeine (coffee to 3 a day and tea to 6 a d ay I think)
Alcohol (to one or to units, once or twice a week).
Seafood is for the food poisoning risk again so I'd avoid anything raw (oysters etc) and the didgier shellfish like mussels but it hasn't stopped me eating prawns. I've never been ill from a prawn.
Fruit, veg and salad should be washed but you should be eating lots.
The only nuts to avoid - unless you have a specific nut allergy risk - are peanuts, and these only if you have a family history of eczema, asthma etc.
I've heard that you're not meant to eat cold cuts - ham etc - but I haven't paid any attention to that one. I think with that kind of buffet food you just have to use your common sense about how long it's been sitting about, how fresh it looks etc.