strange insect with a shell pls help identify

strange insect with a shell pls help identify

Observation - strange insect with a shell pls help identify - UK and Ireland. Description: The shell is brown and a bit pointy and the edge near its head is white and looks a bit like cotton wool. The shell covers the top of the insect and when it walks its head antennae and tail end stick out . The insect itself is white with black lines and d

The shell is brown and a bit pointy and the edge near its head is white and looks a bit like cotton wool. The shell covers the top of the insect and when it walks its head antennae and tail end stick out . The insect itself is white with black lines and dots on. It seems to use its tail to assist with walking. When it 'sleeps it puts its whole body inside its shell.It has six legs.