The materials used to construct the tunnel had to be purchased and the costs recorded so that the cheapest, strongest, most efficient tunnel could be ascertained.

Congratulations to WR, who achieved a first prize of a £35 gift voucher and a certificate from the University.

Congratulations also to HP, who achieved a second prize of a £25 gift voucher and a certificate from the University.

Congratulations also to CW, who achieved a third prize of a £15 gift voucher and a certificate from the University.