Kent (UK), Belgium, Germany, Austria, Hungary and Romania.
Yes.
Romania was allied with UK, France, Italy, Russia etc.
any food you want
Not a different government; Romania is now - but only theoretically - an independent and democratic country.
Yes, it is possible.
You need a passport or an ID.
I recommend to use Skype.
The difference is two hours.
No different directions for Romania and Bulgaria after 1990.
No, Romania and Russia are different now.
Not necessary for United Kingdom citizens.