welcome to bbc news. a special concert will take place tonight at buckingham palace as a weekend ofjubilee celebrations continues, to give thanks to the queen for her 70 year reign. 22,000 people will gather for the platinum party at the palace, when the prince of wales and the duke of cambridge will pay tribute to the queen for her enduring service. the derby at epsom also takes place afternoon but the queen will not attend. instead, she s expected to watch the event on television from windsor castle. would you like another one? the queen s love of horses is well known. these pictures were filmed earlier this year, at the royal stud. however, she won t be attending the epsom derby later today, but will watch on the television instead. just as she watched yesterday s national service of thanksgiving at st paul s cathedral. her mobility issues prevented her being there in person to hear the thanks for a lifetime dedicated to faith and public service. her family were there, how