If the bike isn't too expensive and you have someone in the UK you trust, it might be easier to get someone here to hold it for you until travel is possible/sensible/permitted.
That would definitely be easier, but unfortunately I don't know anyone in the UK. I did ask the seller if you would be willing to hold on to the bike until it is okay to travel again, but he needs to clear the space.
If the bike isn't too expensive and you have someone in the UK you trust, it might be easier to get someone here to hold it for you until travel is possible/sensible/permitted.