What is a long-life asset for capital allowances? What allowances can be claimed on long-life assets?

This is a freeview 'At a glance' guide to long-life assets. 

At a glance

Excluded assets

The following are excluded from being long-life asset expenditure:

Agreements have been made with particular industry bodies to exclude certain assets from being treated as long-life assets, these include certain aircraft, Greenhouses, water supply, and printing equipment.

Useful guides on this topic

Plant & machinery: Allowances
What are the capital allowances on plant and machinery? How do you calculate them? What are the qualifying activities?

What expenditure qualifies for plant & machinery allowances?
What is plant and machinery? What expenditure qualifies as plant and machinery? What is treated as part of a building?