A compound of formula: wherein: Q is O; R 1 is a non-aromatic heterocyclic group selected from: wherein R 1 is attached to the sulfur atom of the sulfonylurea group by a ring carbon atom, and wherein R 1 may optionally be substituted with one or more substituents independently selected from halo; -CN; -NO 2; -N 3; -RP; -OH; -ORP; -SH; -SRP; -SO 2 R β; -NH 2; -NHRP; -N(R β) 2; -CHO; -COR β; -COOH; -COOR β; -OCOR β; -R α -CHO; -R α -COR β; -R α -COOH; -R α -COOR β; -R α -OCOR β; -NH-CHO; -NR β -CHO; -NH-COR β; -NR β -COR β; -CONH 2; -CONHR β; -CON(R β) 2; -R α -NH-CHO; -R α -NR β -CHO; -R α -NH-COR β; -R α -NR β -COR β; -R α -CONH 2; -R α -CONHR β; -R α -CON(R β) 2; a C 3 -C 7 cycloalkyl group optionally substituted with one or more C 1 -C 3 alkyl or C 1 -C 3 haloalkyl groups; a C 3 -C 7 cycloalkenyl group optionally substituted with one or more C 1 -C 3 alkyl or C 1 -C 3 haloalkyl groups;; oxo (=O); or a C 1 -C 4 alkylene bridge; each -R α - is independently selected from an alkylene, alkenylene or alkynylene group, wherein the alkylene, alkenylene or alkynylene group contains from 1 to 6 carbon atoms in its backbone, and wherein the alkylene, alkenylene or alkynylene group may optionally be substituted with one or more halo and/or -R β groups; each -R β is independently selected from a C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl or C 2 -C 6 cyclic group, and wherein any -R β may optionally be substituted with one or more C 1 -C 3 alkyl, C 1 -C 3 haloalkyl, C 3 -C 7 cycloalkyl, -O(C 1 -C 3 alkyl), halo, -CN, -C≡CH or oxo (=O) groups; each -R δ is independently selected from a C 1 -C 6 alkyl or C 1 -C 3 haloalkyl group; each m is independently selected from 1, 2 or 3; each n is independently selected from 1, 2 or 3; and R 2 is: Q is O; R 1 is a non-aromatic heterocyclic group selected from: wherein R 1 is attached to the sulfur atom of the sulfonylurea group by a ring carbon atom, and wherein R 1 may optionally be substituted with one or more substituents independently selected from halo; -CN; -NO 2; -N 3; -RP; -OH; -ORP; -SH; -SRP; -SO 2 R β; -NH 2; -NHRP; -N(R β) 2; -CHO; -COR β; -COOH; -COOR β; -OCOR β; -R α -CHO; -R α -COR β; -R α -COOH; -R α -COOR β; -R α -OCOR β; -NH-CHO; -NR β -CHO; -NH-COR β; -NR β -COR β; -CONH 2; -CONHR β; -CON(R β) 2; -R α -NH-CHO; -R α -NR β -CHO; -R α -NH-COR β; -R α -NR β -COR β; -R α -CONH 2; -R α -CONHR β; -R α -CON(R β) 2; a C 3 -C 7 cycloalkyl group optionally substituted with one or more C 1 -C 3 alkyl or C 1 -C 3 haloalkyl groups; a C 3 -C 7 cycloalkenyl group optionally substituted with one or more C 1 -C 3 alkyl or C 1 -C 3 haloalkyl groups;; oxo (=O); or a C 1 -C 4 alkylene bridge; each -R α - is independently selected from an alkylene, alkenylene or alkynylene group, wherein the alkylene, alkenylene or alkynylene group contains from 1 to 6 carbon atoms in its backbone, and wherein the alkylene, alkenylene or alkynylene group may optionally be substituted with one or more halo and/or -R β groups; each -R β is independently selected from a C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl or C 2 -C 6 cyclic group, and wherein any -R β may optionally be substituted with one or more C 1 -C 3 alkyl, C 1 -C 3 haloalkyl, C 3 -C 7 cycloalkyl, -O(C 1 -C 3 alkyl), halo, -CN, -C≡CH or oxo (=O) groups; each -R δ is independently selected from a C 1 -C 6 alkyl or C 1 -C 3 haloalkyl group; each m is independently selected from 1, 2 or 3; each n is independently selected from 1, 2 or 3; and R 2 is: