I know that I live in Ireland and the EU and that this may seem like Brit bashing but it is most definitely not. I have 2 worries about the UK vacinations.
1) manufacturers recommendations are there for a reason. EG would you extend service interval of your car by a factor of 3: 3 years instead of 1,
2) the manufacturer says 5 doses per vial but Boris wants to get 6.
I think that they are too new to play around with.
At 67yo and a smoker I am looking forward to getting the vaccine, preferably the Oxford one but I won't reject anyone of them.
On a lighter note: on the lockdown survival kit, I have managed to secure 5 bottles of Jameson over the Xmas (all free).