Posted: 07/07/2014 at 20:12
SusiB, the new growth is healthy enough, but they are old, they may do well with a good feed and a mulch. The Lichen you can leave in place if you want it'll do the roses no harm. If you do decide to remove them, you can replant roses in the same bed if you add mychorrizal fungi to the planting hole along with plenty of Farmyard Manure.
The old advice of rose sick soil is out of date, the mychorrizal fungi replace what the previous occupant used up.