Quite possibly, after this last winter, specially if you didn't provide protection as recommended. Even some of the protected ones died this year. That said, though, I'm puzzled by the fact you say last year's fronds are dying off - most tree ferns start the new year completely frondless, and new ones start growing in late spring - if yours kept its fronds all winter, it must have been very sheltered, or even in a greenhouse.

I did pack the tree fern for the winter with some of the dead fronds, it is in a quite sheltered area.

So the fronds did die back over winter, as expected? That sort of protection is usually enough, but last winter was particularly harsh, so you may have lost it. You can try giving it a drink of sugary water in the top, see if that kickstarts things, but if not, its an ex tree fern, I'm afraid.

Many thanks for your help i will try the sugary water. thanks

Hmm, well, Marguerite, with respect, I'd suggest you are unaware of the unusually harsh conditions we had here in the UK last winter - many people have, indeed, lost their Tree Ferns, and the number of Cordylines, mature and young, lost to the winter numbers in the thousands.