Just to wrap this up: I sent the HP Laptop 17-ak0xx back to the supplier and bought a HP-Laptop-17-bs0xx instead with Intel processor and graphics. Installation of Mint Cinnamon 18.3 as dual boot with W10 went smoothly in one afternoon. The only problem that arose was the wifi adaptor not being recognised but that was easily resolved as here: viewtopic.php?f=53&t=263115
Thanks everyone.
Russell
Laptop: HP17bs086nf, Intel Core i5-7200U, Intel HD Graphics 620 . Mint Cinnamon 21.1
Desktop: ASUS Prime B760-plus D4 motherboard, AMD Radeon RX6500XT, Intel 12th gen i7 12 core 3500MHz, 8GB ram, 500GB Samsung SSD, Mint Cinnamon 21.1