Preheat the oven to 180°C/Fan 160°C/Gas 4
In a saute or large frying pan, add a splash of olive oil, add the chopped onion and cook over a low heat for 10 minutes until just starting to brown.
Add the mince and cook until browned all over stirring occasionally.
Sprinkle over the mixed herbs and Worcester sauce and simmer for 1 minute.
Add the tomato puree, tomato sauce and simmer for a few minutes. Remove from the heat and allow to cool slightly.
In a shallow ovenproof lasagne dish spread, ⅓ of the meat sauce over the bottom then add a layer of lasagne sheets.
Spread ⅓ of the creamy white sauce over the lasagne sheets. Repeat the layers 2 more times. Finally, sprinkle the grated cheese over the top layer of white sauce.
For best results, leave to rest for up to 6 hours to allow the pasta to start to soften.
Put in a preheated oven at 180°C/Fan 160°C/Gas 4 on the middle shelf for 30 minutes or until golden brown on top, the pasta is soft, with bubbling around the edges.