I’ve done about 4 first aid courses over the last 6 months – 2 emergency first aid and lasted 8 hours each, 1 Emergency first with Forestry and lasted a day and the final 1 was a 2 day first aid course.
The 2-day first aid course is needed for outdoors things, but apart from time spent on practicing the drills, it didn’t cover anything else that the 1-day course covered. The practicing of the drills was definitely beneficial, but I’m not clear on why outdoor things need a 2-day first aid course to be completed if it covers the same stuff as the 1 day (although there were more practical drills being done, so it might just be that doing the 2-day course means you go through dry runs of what you could/would/should do to assist).
The 2-day course I did was from https://firstaidtrainingcooperative.co.uk/outdoor/ – it was a good course, the instructor was very good and it was a good 2 days (despite me wondering what the benefit of the 2 days was – other than practical drills) – I’d recommend it.
Edit – just reading Alexpalefan’s post and agree about the crisis stuff – the Emergency First Aid with Forestry did cover this so perhaps I was already aware having completed that course 2 months prior.