In 1989 Cressida Granger and David Mulley took over the running of Walker's original company, Crestworth, situated in Poole, Dorset, and changed the name to Mathmos in 1992.
I 1989 overtog Cressida Granger og David Mulley driften af Walkers originale virksomhed, Crestworth, situeret i Poole, Dorset, og ændrede i 1992 navnet til Mathmos.