Yes, you can.
Royal Mail will attempt the delivery but if nobody was there to sign for it, or if it was too big for your letterbox Royal Mail will leave a ‘Something for you’ (also known as a P739) card. You can then collect your item from your local Depot or request redelivery on a more suitable date.
More Information on how to collect or book your redelivery please follow the link below.
http://www.royalmail.com/personal/receiving-mail/redelivery