For the prawn skewers:
1) Soak the wooden skewers in water for at least 30 minutes. Skewer the lemon and lime wedges with 2 to 3 large prawns on each stick. Brush with oil so they don't stick to the grill.
2) Either sear on a hot barbecue or under the grill until the prawns are cooked, about 5 to 7 minutes.
For the chilli dip:
1) In a small bowl mix the honey, mustard and crushed chilli flakes.