Hi liteweight
There is no Capital Gains Tax liability on either the estate or on your daughter.
Death is not a disposal for CGT purposes. Your daughter acquires the shares at the market value at the date of death (or maybe, more precisely, when she receives them from the executor?). She will be subject to CGT on any gains between now and when she disposes them.
This is a very interesting tax planning point. People who are investing for the very long term and who expect to leave assets behind them when they die, should invest directly in shares and property and not through unit-linked funds. The unit-linked fund is subject to 23% exit tax when the person dies, but the gains on directly held assets are tax-free.