Alpine 400 Down Sleeping Bag (-5C)

If you can spend an extra £15 this would be a good option, especially for backpacking as it’s reasonably lightweight: https://ultralightoutdoorgear.co.uk/alpine-400-down-sleeping-bag/ This bag would be suitable for lower elevation camping. If you were looking to camp on summits you’d need something warmer; if this is the case, you’ll likely end up having to go with something synthetic that’s both heavier and bulkier, but affordable.