Preheat oven to 350°F.
Combine flour, salt, sugar, and butter in a food processor. Pulse until mixture resembles bread crumbs.
With the processor running, add water a few drops at a time until the dough comes together. Remove dough from bowl and wrap in plastic. Leave to rest in refrigerator for 1 hour.
Roll out pastry and line a greased tart pan with removable bottom. Place in refrigerator for 30 minutes.
Combine golden syrup, molasses, and lemon juice. Beat eggs in a separate bowl then add to the molasses mixture. Stir in bread crumbs.
Carefully pour mixture into the prepared tart shell.