Mix together the ketchup, honey, lemon juice, oil and Worcestershire sauce
in a saucepan over a low heat until warm through. Pour over the steaks in
a shallow dish and leave to marinate for 30 minutes, turning once. Cook
under a medium grill (broiler) for about 30 minutes, basting frequently
with the marinade while cooking. Cut a cross in the tomatoes and add them
to the grill for the final 5 minutes of cooking.