I'll be growing T&M's tall-growing "tree lilies" this summer to report back in Gardeners' World Magazine next year. If anyone is trying them this summer then do let us know how you get on at gwletters@bbc.co.uk
Happy Gardener, as far as lily beetle are concerned, you can spray with insecticide to prevent attack. Alternatively be vigilant! Lily beetle start attacking fritillarias in spring, and then move on to lilies. I check plants daily if possible, looking for signs of red beetles at the tip or evidence of leaves being nibbled. Pick off and destroy any pests you find.