A 48-year-old man has been grilled by police over allegations he exposed his genitals to a woman on a train in South Oxfordshire.

British Transport Police announced this afternoon they had identified the man following an appeal on Christmas Eve in which they published a photo of a man they wanted to speak to.

The force said the man they had identified was now 'assisting police with their enquiries' into the allegation of outraging public decency.

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The woman in question said she was on a train to Henley-on-Thames on December 13 when the man got on at Twyford shortly after midnight and sat down facing her.

She said he then exposed his genitals and began to touch himself inappropriately.

Officers did not accuse the man in the photo but said they 'believed he may have information which could help their investigation'.

The force is no longer appealing for witnesses.