Naturalist says he has been ‘overwhelmed by greetings’ as milestone is marked with event at Royal Albert Hall Naturalist says he has been ‘overwhelmed by greetings’ as milestone is marked with event at Royal Albert Hall David Attenborough said he had been “completely overwhelmed by birthday greetings” for his centenary on Friday and thanked wellwishers “most sincerely”. The naturalist said he had hoped to celebrate his 100th birthday quietly. Instead, the milestone will be marked with a live