outdoor heater

I am looking at getting one of these to complete a courtyard project: https://www.amazon.co.uk/Outsunny-Outdoor-Ceiling-Aluminium-Electric/dp/B01KYUNLJ2/ref=cm_cr_arp_d_product_top?ie=UTF8 They only come with 1.5m of cable which after talking to someone at another supplier of a similar thing...