Both were far too slow in dealing with the outbreak of the pandemic around January/February time. I flew back to Scotland from Singapore in mid-February. Admittedly Singapore had an outbreak earlier than the UK, but they also acted far more quickly and effectively. The week that I left was the seventh week of restrictions in Singapore. Between leaving my apartment block to go to the airport and boarding the flight, I had my temperature checked four times, two of which were full body screenings. Compare that to transferring at Heathrow and arriving at Glasgow and the difference was stark. Neither airport had any hand gel or masks available for the public, either for free or for sale. In the six hours I spent in Heathrow waiting for my connection I didn't see or hear any signage/messages regarding social distancing or anything COVID related.
There are plenty of valid criticisms to be made of the UK Government's handling of the pandemic. Off the top of my head; 'herd immunity', both a lack of PPE and spending millions of pounds buying unusable PPE, dithering over an EU support mechanism regarding the supply of ventilators, inadequate messaging such as 'control the virus' and 'stay alert' and the entire Cummings fiasco. There are probably a dozen more that could be listed. The infection and death rate in care homes across the UK has been abysmal. Scotland's administration acted too slowly initially, but they've made less fatal errors than England. I'm fearful of a second wave hitting soon, and I think it will hit England far harder than rUK.