The best roast beef with all the trimmings

Name: The best roast beef with all the trimmings
Prep time: 50 min
Cook time: 35 min
Total time: 1 h 25 min
Cuisine: British
Ingredients: 1kg eye-fillet of beef; 3 garlic cloves, thinly sliced; 36.40 gm olive oil, plus extra to brush; 40.00 ml chopped rosemary; 30 thin slices flat pancetta, rind removed; 500.00 ml roughly chopped onion, carrot, celery; 11.20 gm tomato paste; 20.00 ml plain flour; 250ml shiraz; 1 bay leaf; 500ml beef stock