Interesting thread, because I will shortly require another eye test (for license renewal) and my last one was at Boots . . an experience I'm not keen on repeating.
Asda is probably easiest for parking (bonus is they also sell Brandy) and at my age cheap frames are plenty good enough, I'm not out to impress anyone
2 pair required, reading & driving (although can't really tell much difference)
May enquire about new lens into existing frames if that's possible?