Studs, nuts, springs, spring cups, washers and fire ring/seal/gasket/whateveryouwanttocallit. 
Peugeot parts desk should be able to sort one off your registration or engine type. Tbf i think the £7 was probably trade price, but it's not expensive by any means.
The fire ring will be stuck to your exhaust elbow, guaranteed lol. Will most likely need to chip it off with a screwdriver to being with, they tend to laminate themselves on fairly well.
Peugeot parts desk should be able to sort one off your registration or engine type. Tbf i think the £7 was probably trade price, but it's not expensive by any means.The fire ring will be stuck to your exhaust elbow, guaranteed lol. Will most likely need to chip it off with a screwdriver to being with, they tend to laminate themselves on fairly well.