Large snail in Hackney

Large snail in Hackney

Observation - Large snail in Hackney - UK and Ireland. Description: 8 large snails have been spotted in Hoxton Square, Hackney. This picture is very blurry but does give an idea of size as a lighter has been placed next to it for scale. Any suggestions for what it is?

8 large snails have been spotted in Hoxton Square, Hackney. This picture is very blurry but does give an idea of size as a lighter has been placed next to it for scale.

Any suggestions for what it is?