If it has gone, and your setting for it is suitable, you can use the remaining stem as a haven for other ferns and epiphytes.

(You're unlikely to want to do this but - near where I live there are gorse plants growing on still-live tree ferns and stretching their roots to reach true ground. There are others with perching plants, ferns, and indigenous trees such as rata which get their start in the ruggedness of the tree fern's bark. At home I have Zygocacti and bromeliads perching, too. They might not be quite the thing for the north of England but you may have hardy orchids and ferns that would be happy there.)

Hope it comes through for you.

Dicksonia squarrosa and fibrosa may well sprout from further down. They'll resprout after being driven over and flattened by log haulers after clear-felling.

The Aussie Dicksonia hasn't, in all the time it's been in the garden. Nearly 30 years.

You might find that mulching with pine needles or bark chips could help. Apply lightly only.

In the bush there is an ongoing mulching effect from the overhead evergreen trees such as southern beeches, or Pinus radiata needles in the forestry areas where tree ferns grow thickly in the firebreaks and open gullies - sheltered, and open to good light.