The Beckhams can afford to send their children to private school but I wouldn't call them middle class... no, she is lower middle class, he is working class.
(Victoria) Beckham was born at the Princess Alexandra Hospital in Harlow, Essex, United Kingdom, and raised in Goffs Oak, Hertfordshire.[8] She is the eldest of three children of Jacqueline Doreen (née Cannon), a former insurance clerk and hairdresser,[9][10] and Anthony William Adams, who worked as an electronics engineer.[8] They founded an electronics wholesale business which allowed a comfortable upbringing for Victoria, her sister, Louise,[1] and her brother, Christian Adams.[11] Beckham's great-great-great-grandfather was German artist and revolutionary Carl Heinrich Pfänder [de] and great-great granduncle was Minnesota politician William Pfaender. [12][13]
Her parents were very wealthy.
(David)Beckham was born at Whipps Cross University Hospital in Leytonstone, London, England.[24] He is the son of Sandra Georgina (née West; b. 1949), a hairdresser, and David Edward Alan "Ted" Beckham (b. Edmonton, London, 1948), a kitchen fitter, who married in the London Borough of Hackney in 1969.[25] He has an older sister, Lynne Georgina, and a younger sister, Joanne Louise. He regularly played football in Ridgeway Park, Chingford, as a child, and attended Chase Lane Primary School and Chingford County High School.[26]
The likes of Boris Johnson and David Cameron are upper middle class - the sheer volume of people on MN who think because they passed their 11+, it somehow elevates them to the same lofty heights is laughable.