A "predatory" paedophile who abused a teenager with learning difficulties has been jailed for life.

Oxford Crown Court heard today that Martin Rees, from Queensway, Didcot, groomed the boy by taking him to football matches and buying him gifts.

The 55-year-old, who worked as a shunter at Didcot Parkway train station, admitted six counts of sexual activity with a child.

Judge Anthony King was also asked to take into account two further sexual assaults Rees carried out on a boy when he was 19.

Jailing him for an indefinite period, Judge King said Rees had identified and attacked the boys in a predatory manner.

He said Rees was a danger to the public and would be on the sex offenders' register for life, while also being the subject of a sex offenders' prevention order.

The officer in charge of the case, Det Sgt Darren Cartwright, said: "Rees identified his latest victim as a vulnerable child and therefore easier to obtain his trust.

"We later discovered Rees had also abused a boy in a very similar fashion in the 1970s. This case demonstrates that no matter how old offences of this nature are, we will prosecute them where we can."