A dispenser (1, 101) for a gaseous, gas borne or droplet substance contained in a source thereof, the dispenser comprising: • a substance source (2, 34, 102, 206, 306, 406, 506) having: ∘ an external surface (5, 105, 205) devoid of any feature intended for longitudinal location of the source and ∘ a spout (4, 104) displaceable inwards of the source to a fully depressed dispense position for dispensing a substance dose from the source; • a junction member (14, 15, 114, 115) for the spout, the junction member being arranged in a body to be slidable to a set position for displacing the spout to its fully depressed dispense position; • the body (3, 103, 503) having: ∘ a mouthpiece (11, 111) via which the substance dose can be inhaled; ∘ a socket (7, 33, 107, 207, 307, 407, 507) sized for lateral location of the source via its external surface, but devoid of any body feature intended for longitudinal location thereof; and ∘ a pivotable mouthpiece cover (12, 112) drivingly connected to a cam (13, 113) which bears on the underside of the junction member (14, 15, 114, 115) for slidably moving the junction member to the set position when the cover (12, 112) is opened; and • a unification (21, 31, 32, 41, 42, 121, 122, 222, 322, 411, 553) of the source or a source locator (550, 551, 552) to the body which locates the source longitudinally with the spout in its fully depressed dispense position when the junction member is in its set position, the locator where provided extending from the body, outside the source and at least partially across the end of the source to provide a longitudinal location for the source, locating it when the movable junction member acts to fully depress the spout inwards of the source. • a substance source (2, 34, 102, 206, 306, 406, 506) having: ∘ an external surface (5, 105, 205) devoid of any feature intended for longitudinal location of the source and ∘ a spout (4, 104) displaceable inwards of the source to a fully depressed dispense position for dispensing a substance dose from the source; ∘ an external surface (5, 105, 205) devoid of any feature intended for longitudinal location of the source and ∘ a spout (4, 104) displaceable inwards of the source to a fully depressed dispense position for dispensing a substance dose from the source; • a junction member (14, 15, 114, 115) for the spout, the junction member being arranged in a body to be slidable to a set position for displacing the spout to its fully depressed dispense position; • the body (3, 103, 503) having: ∘ a mouthpiece (11, 111) via which the substance dose can be inhaled; ∘ a socket (7, 33, 107, 207, 307, 407, 507) sized for lateral location of the source via its external surface, but devoid of any body feature intended for longitudinal location thereof; and ∘ a pivotable mouthpiece cover (12, 112) drivingly connected to a cam (13, 113) which bears on the underside of the junction member (14, 15, 114, 115) for slidably moving the junction member to the set position when the cover (12, 112) is opened; and ∘ a mouthpiece (11, 111) via which the substance dose can be inhaled; ∘ a socket (7, 33, 107, 207, 307, 407, 507) sized for lateral location of the source via its external surface, but devoid of any body feature intended for longitudinal location thereof; and ∘ a pivotable mouthpiece cover (12, 112) drivingly connected to a cam (13, 113) which bears on the underside of the junction member (14, 15, 114, 115) for slidably moving the junction member to the set position when the cover (12, 112) is opened; • a unification (21, 31, 32, 41, 42, 121, 122, 222, 322, 411, 553) of the source or a source locator (550, 551, 552) to the body which locates the source longitudinally with the spout in its fully depressed dispense position when the junction member is in its set position, the locator where provided extending from the body, outside the source and at least partially across the end of the source to provide a longitudinal location for the source, locating it when the movable junction member acts to fully depress the spout inwards of the source.