• Retired BBC worker claims that 'big names' were involved in abuse

• Dando 'handed a file to management but nothing was done about it'

• The BBC said it had not seen anything to substantiate the claims

Murdered Crimewatch presenter Jill Dando tried to get BBC bosses to investigate an alleged paedophile ring in the corporation, it has today been claimed.

A former friend and retired BBC worker has claimed that the television host was told that 'big name stars' and BBC staff were involved in abuse.

But when she tried to get her superiors to investigate, and handed a file to senior management, no action was taken, the source claims.