Grease and line the base of a 20cm tin with baking parchment.
Place the sugar, golden syrup, clotted cream, vanilla extract and liquid glucose in a large saucepan.
Heat gently, stirring until the sugar dissolves. Bring it to a boil, cover the fudge with a lid and boil for 3 minutes.
Uncover the fudge and continue to boil until the temperature reaches 116 °C / 240 °F.
Remove from the heat and leave the fudge to one side until the bubbling subsides. When it has stopped bubbling, add the mincemeat and beat the mixture until it becomes thick.
This can take over 10 minutes, so prepare to have a tired arm! When the fudge has been beaten enough, it will be matte, very thick and a little bit grainy.
Pour the fudge into the tin and leave for 30 minutes. Mark it into squares with a knife and leave until set. Cut into pieces and store in an airtight container. The fudge will keep well for up to 2 weeks.