I can almost hear you rubbing your hands together OP, at the chance of showing something, just something is better here then in the EU. Sadly this one won't do it.
Firstly, although not in the OP it has been mentioned elsewhere, we could have done exactly what we have done if we were still in the EU.
Secondly, member states were in no way obliged to take part in the EU’s joint vaccine procurement scheme. The EU has very limited competences for public health under its founding treaties: it can take action only to “support, coordinate or supplement the actions of the Member States”. The EU member states in this case voluntarily decided to opt into the joint procurement scheme.
So all another 'untrue' bent banana story which, rather like Johnson's account, will crash and burn over time.
Now I do how you will offer a correction wherever you can.