Pennisetum ( Frost resistance? )

I have a number of Pennisetum alopecuroides and have received conflicting advice as to whether or not they will survive the winter without being lifted indoors. Any advice i live in North Cambridgeshire.
Thanks Kev

 

Mine do OK here in rainy Bedfordshire and have done so for some years, but they are in a sheltered spot. With the winter forecast, I would lift some just as insurance.

 

Thanks for your advice Fran
Kev