Chicken Shawarma flatbreads with yoghurt

For the chicken

2 tbsp extra virgin olive oil

1 tsp sumac

1/4 tsp roasted and ground cumin

juice of 1/2 lemon

2 garlic cloves, crushed

1 tbsp fresh thyme leaves

1/2 tsp chilli flakes

6 boneless chicken thighs

For the yoghurt raita

200g (7oz) labneh or thick natural yoghurt

1 tsp sumac

juice of 1/2 lemon

1 small tsp honey

1 tbsp fresh mint, leaves chopped

To Serve

4 flatbreads

1 little Gem lettuces

1/2 cucumber, cubed

sumac

2 tbsp pomegranate seeds

fresh coriander, chopped