Only You Can Prevent a Skin Cancer!
Protect your skin with a hat, appropriate clothing and 30+ UVA/UVB SPF sunscreen. You'll need 30ml (a handful) of sunscreen to cover the whole body. Apply 20mins before exposure. Wear a "rashie" if you're swimming outside. Protect your skin even if the sky is overcast.
Try to modify your activities so that you're not outdoors during the middle of the day when the UV is highest.
Check your own skin (including the groin, armpits, feet) every 6 months and ask someone else to check your back and scalp. Ask your GP or dermatologist to look at any lesion that is new or has been changing.
See your USUAL GP once a year for a skin check. If there are any concerns, they will refer you to a dermatologist (skin specialist). There is no need to be seen at one of the many "Skin Cancer Clinics". These are run by GP's- not dermatologists.