I'm not even allowed to operate a kettle!

I was told not to use a kettle for 24hours after a general anaethetic. I think they say that just incase you were to feel a bit unsteady and pour the boiling water over yourself. Although mild, the effects can last that long with a general so they err on the side of caution.

When I worked at the hospital, a liquid diet included all those things you mentioned. There is a difference between jelly and jello though, and when you were googling it if you put the search term jelly then you got the wrong results. Jelly is made from cooked fruits and sugars and is used for spreading on toast or biscuits (etc); jello is classified as a clear liquid and should NOT interfere with the test. Jello is made from other materials, and sometimes people add bits of fruit to it. IE: while the jelly might show up in a test, the plain jello won't. If you indeed ate jelly (and not jello) tell the technicians as it might make a difference in the test, and if not, then they are alerted to it. Some places cancel & reschedule the test if the dietary restrictions are not followed. As far as the 'machinery', most times it's a reccomendation that you not drive a motor vehicle. It takes a while for sedatives and anaesthetics to get fully out of our body, and some people are more sensitive to it than others. A tea-kettle isn't techinically 'machinery', but if you really need something hot then stay right in the kitchen while the kettle's on. I had this same proceedure last year, while it did say not to operate a motor vehicle, nowhere did it ever say not to operate a tea-kettle. (I remember the last time I was sedated it took a day or so to quit falling asleep on and off.)