An access panel for a horizontal opening, the access panel (11) comprises a parallel array (12) of members (14, 15, 16) and a lateral extent (W) of the array (12) corresponding to a lateral extend (D) of the opening between first (17) and second (18) end members of the array (12) defining a length (L) of the panel (12). At least two pantograph units (20, 21) extend between the first (17) and second (18) end members and each member (14-16, etc.) in the parallel array (12) is pivotably linked to each pantograph unit. The members (14, 15, 16 etc) and units (20, 21) permit the panel (11) to function as a planar structure and enable the length (L) of the panel (11) to be varied between a minimum length (L1) and a maximum length (L2) and an intermediate configuration having a length between the minimum and maximum lengths (L1, L2).

An access panel for a horizontal opening, the access panel (11) comprises a parallel array (12) of members (14, 15, 16) and a lateral extent (W) of the array (12) corresponding to a lateral extend (D) of the opening between first (17) and second (18) end members of the array (12) defining a length (L) of the panel (12). At least two pantograph units (20, 21) extend between the first (17) and second (18) end members and each member (14-16, etc.) in the parallel array (12) is pivotably linked to each pantograph unit. The members (14, 15, 16 etc) and units (20, 21) permit the panel (11) to function as a planar structure and enable the length (L) of the panel (11) to be varied between a minimum length (L1) and a maximum length (L2) and an intermediate configuration having a length between the minimum and maximum lengths (L1, L2).

A roller apparatus (102) is provided including roller means (104), drive means (110) for driving rotation of the roller means in use, and an electrical power source for providing electrical power to the drive means in use. The electrical power source is provided by one or more batteries (112) located internally of the roller means.

The invention relates to a mobile maintenance workshop for vehicles, which comprises a base-floor, two side walls and a roof, at least one of the side walls being hinged relative to the base-floor so as to be movable between a raised position and a lowered position. According to the invention, the roof is hinged relative to at least one movable side wall so as to be movable between a folded position and an unfolded position, in which the roof forms at least one access ramp to the platform in the lowered position of said associated movable side wall.

A cover for covering an opening defined in a surface, the opening defined between a first edge and a second edge, and defining an opening width therebetween, shorter than a length of the opening, the cover having a cover width and configured to be supported, in use, at the first edge and the second edge of the opening when the cover width is parallel to the opening width, wherein the cover width is adjustable from a first cover width to a second cover width, and wherein the cover is configured to maintain the cover width at the second cover width, in use.

A cover for covering an opening defined in a surface, the opening defined between a first edge and a second edge, and defining an opening width therebetween, shorter than a length of the opening, the cover having a cover width and configured to be supported, in use, at the first edge and the second edge of the opening when the cover width is parallel to the opening width, wherein the cover width is adjustable from a first cover width to a second cover width, and wherein the cover is configured to maintain the cover width at the second cover width, in use.