What guidelines are there for the driving of MEWPs on public highways? What about weights and loads?

IPAF provides the following quick reference guides for suppliers and users.

Issues covered include:
• Machine weights and permissible loads
• Taxation and regulations affecting vehicle mounted MEWPs used in the highway
• Schedule 3, Engineering Plant
• Extracts from Statutory Instrument 2003 No. 1998, The Road Vehicles (Authorisation of Special Types) (General) Order 2003 s49-(1) - Vehicles fitted with a moveable platform.

For the UK see this information sheet from the UK Government