A large anti-monarchy protest formed outside of Westminster Abbey today, calling for Charles and William's involvement in the Andrew scandal to be investigated.
 
As royals entered the service, activists from the anti-monarchy group Republic held up placards reading out 'What did you know?' - referring to royal complicity in the Andrew scandal.
 
Andrew Mountbatten-Windsor was arrested on the 19th February, in response to a crime report sent to Thames Valley Police by Republic's CEO Graham Smith.
 
Speaking for Republic, Graham Smith said today:
 
"Charles and William - what did you know about Andrew?"
 
"It's a simple question, but one the royals have failed to answer. It's inconceivable to think that they knew nothing about the allegations against Andrew."
 
"We need a Royal Epstein Inquiry now, so we can uncover this cover-up. That's why Republic will keep protesting at royal events like today, holding the monarchy accountable."
 
"Support for the monarchy is falling and Republic is growing. It's now a question of when, not if the monarchy will be abolished."
 
PHOTOS and VIDEOS are available here.