Posted: Yesterday at 19:24
BeaJ.............if your trees look happy in their pots at the moment, leave them other than making sure they get enough water.
If you think they are pot bound now, you should get away with repotting in slightly larger pots at this time of year.
The Olive may be the one to be concerned about.......if only a young tree, you would be better to keep it frost free this year (in a cold g/h if you have ? ). Other than that, protect the pot in frosty conditions so that the roots aren't damaged and if really cold, fleece the tree too.
The other trees you mention are hardy in the UK but in pots, you need to remember they are more vulnerable to the weather............i.e. hot and dry or freezing cold.