Put the pork fillet in a hallow dish, next to each other
Mix the lemon juice, soy sauce, elderflower syrup and thyme leaves, then brush the meat with this mixture.
Turn them over and brush the other side too, then drizzle any remaining glaze over them.
Marinate for minimum 30 minutes, or longer, if time allows.
Heat your BBQ, griddle pan or frying pan.
Season the pork with salt and pepper, then grill/fry the pork for 3-5 minutes on each side, brushing them with the marinade a couple of times.
Serve warm with side dishes of your choice.