YA MI Telescopic Ladders, Multi-Purpose Folding Aluminum Extension Ladder, It is applicable to RV, Attic, Home and outdoor work, With the maximum bearing capacity of 150KG (12.5Ft/3.8M) : Amazon.co.uk: DIY & Tools
Mac Allister 8 tread Telescopic Ladder | DIY at B&Q
Werner Telescopic Extension Ladder 3.2m | Toolstation