According to Official Guinness Records,
The largest scotch egg weighed 6.2 kg (13 lb 10 oz) and was made by Clarence Court and Lee Streeton (both UK) at the Albemarle of Rocco Forte's Brown's Hotel, London, UK, on 30 July 2008.
A 1.7 kg ostrich egg, 4 kg of sausage meat, 940 g of haggis and 800 g of breadcrumbs were used. The entire cooking took more than eight hours.
For a complete list of 2008 records, please visit 2008 Guinness Records in United Kingdom.