A 13-year-old schoolgirl's "narcissistic" killer has been jailed for life, after a judge described the killing as "pitiless execution" he used to escape being exposed as a paedophile.

Care worker Stephen Nicholson, 25, will serve a minimum of 33 years for raping and murdering Lucy McHugh.

Nicholson killed Lucy McHugh in July last year after their "secret sexual relationship turned sour", a court heard on Thursday.

Nicholson, originally from Southampton, lured Lucy to her death in woodland at Southampton Sports Centre on July 25 last year.

When she arrived, prosecutors said he "brutally" stabbed her, leaving almost 30 knife wounds which included three "very dangerous" cuts to the carotid artery in her neck.