Is this a British Butterfly, if so, which?

Is this a British Butterfly, if so, which?

Observation - Is this a British Butterfly, if so, which?. Description: From head to edge of wings-2.5cm approx.White & green with small amount of pink on underside of wings.Large green eyes & green hairs on head.Wings look 'leaf' shape.Sat on this daffodil for two days, in cold,windy weather,then disappeared.I didn't see it

From head to edge of wings-2.5cm approx.White & green with small amount of pink on underside of wings.Large green eyes & green hairs on head.Wings look 'leaf' shape.Sat on this daffodil for two days, in cold,windy weather,then disappeared.I didn't see it with open wings.Is this a native butterfly?I haven't found it anywhere.