In an ideal world, Leah Smithers said she could afford to wait for longer-term testing of the Covid-19 vaccines before getting the jab for her 10-year-old son.

But with his juvenile diabetes putting him at greater risk of complications if he contracts the virus - and with so much of his young life already shaped by the pandemic - she is ready for him to receive the vaccine as soon as he is eligible.

"I'm a parent who is concerned about...