1 celery stick, roughly sliced
2 shallots, roughly sliced
4 fresh thyme sprigs
1 tbsp Dijon mustard
100ml/3½fl oz chicken stock
2 tsp wholegrain mustard
1 fresh bay leaf
2 tsp light olive oil
sea salt and freshly ground white pepper
400ml/1â…“ pints double cream
70ml/2â…“fl oz good Scotch whisky