You will have to see how the lockdown regulations are amended closer to the time but be prepared to be disappointed, becasue I heard today a Gov't minister said on the radio (and I'm not sure which one) who was commenting on the number of people who who seemed think that as soon as they had received the vaccine they would safe to return to normal activities.
He went on to repeat almost exactly as I have forewarned, that restrictions cannot be eased until enough of the population have developed enough immunity, becasue whilst you personally may have had the vaccine and developed an immunity to the infection, you can still carry and shed enough virus to infect others without immunity. This is particularly relevant with the new strain presently in the UK, and there are still continuing concerns with other new variants found in other parts of the world.
There is considerable discussion going on about the possibility of increasing the present restrictions, becasue despite teh current ones the infection is still increasing.
Vaccines are our biggest hope at this stage.
So by all means plan trips, but be prepared to change those plans as the situation develops.