advance tickets for Windsor Castle

hi,we are visiting London in two weeks. if we purchase tickets to see Windsor Castle online now, will they arrive early enough for us to receive them?
It looks like they send them via mail rather than email. any thoughts? Many thanks, Sue

Posted by Nigel
East Midlands, England
8742 posts

The quote in the first reply above is for same day purchase. The link provided in the second reply allows a date to be chosen from the interactive calendar for advance purchase.