I am in the market for some new USB Type-C cables and I am aware that not all of them follow the correct specification and can damage whatever is plugged in to them. Google engineer Benson Leung has done a lot of work (and fried some devices!) testing USB Type-C cables and reviewing them on Amazon.com. I’ve attempted to find the equivalent products on Amazon.co.uk and have listed them here alongside the relevant review.
Thank you to Benson for doing the research!

NOTE Please do your own research and make sure you are happy with any USB type C cables and adapters you use with your equipment, this list is provided to aid research rather than to provide any guarantees of safety.

Affiliate links are used throughout.

* Price is at time of writing, check the Amazon widget for the current price.
 

Item Type Review Price* Amazon
OKPOW Hi-speed Gold Plated Nylon Braided USB Type C to Type A Cable Review £9.29  
Anker USB-C to Micro USB Adapter 2 pack Adapter Review £5.99
StarTech 1 m USB-C to USB-A Cable Cable Review £16.19
USB C Cable, VCE® (3.3FT) USB C to USB 3.0 Cable Cable Review £5.99
Coolreall USB-C to Micro USB Adapter 2-pack Adapter Review £5.29
GearIt USB Type C Cable Cable Review £4.82
BlitzWolf Braided USB Type C Cable Cable Review £7.99
Boot Remedy Fast Charge USB 3.1 Type C to USB 3.0 Type A Male Cable Cable Review £6.99
Tronsmart USB C to Micro USB Adapter 2 pack Adapter Review £4.49
Pushingbest MicroUSB adapter Adapter Review £6.99
Xiaomi Original USB Type C Adapter Adapter Review £5.99
AUKEY USB C Cable to USB 3.0 Cable Review £5.99
Anker USB-C to USB 2.0 Cable Cable Review £6.99
NXET Type-C Charge Dock Dock Review £13.99
Tronsmart USB-C to USB-A Cable Cable Review £6.55
CHOETECH USB C Cable Cable Review £3.99
Orzly® – New Certified USB 3.0 (Multi-Colour Pack) of USB-C to USB-A Male Data & Charging Cable Cable Review £14.99
Vinsic® USB Type C Car Charger Adapter Car Charger Review £8.90
Spigen C10C0 USB Type C to USB 3.0 Cable Cable Review £12.99
Cable Matters USB Type C (USB-C) to Type A (USB-A) Cable Cable Review £5.99
Tronsmart USB Type C Car Charger 33W Dual USB Car Charger Car Charger Review £11.99
Anker USB-C to USB 3.0 Cable Cable Review £6.99
CableCreation 2 Pack 56K Ohm Resistance USB 3.1 Type C (USB-C) to USB 2.0 Micro USB Female Adapter Cable Cable Review £6.99
FRiEQ Hi-speed USB 3.1 Type C Cable Cable Review £8.99