If I visit for last admission, how long will I have in the attraction? If you enter for last admission, you will have 2 hours to spend within the attraction. For more information on opening times, please visit here. Related articles How long does it take to go around LEGOLAND Discovery Centre Birmingham? Why am I booking into a time slot? When is LEGOLAND Discovery Centre Birmingham open? I would like to change the date/time of my booking. How do I use my Kellogg's voucher online?