Man Crib Back Room architrave
95mm skirting - 213cm by 110cm https://www.wickes.co.uk/Wickes-Dual-Purpose-Large-Round-Chamfered-Pine-Skirting---15mm-x-95mm-x-2-4m/p/9000263460
then for the internal frame its 20mm by 160mm
use this: https://www.wickes.co.uk/Wickes-Redwood-PSE-Timber---20-5-x-144-x-2400mm/p/9000263476
extended with this: https://www.wickes.co.uk/Products/Painting+Decorating/Mouldings/Stripwood/c/1000207?q=%3Arelevance%3ADepth%3A20%2Bmm&text=&20+mm=20+mm#
but it goes down to 14mm by 160mm in places:
you can use this: https://www.wickes.co.uk/Cheshire-Mouldings-Pine-Stripwood---15-x-68-x-900mm/p/273227