Put
lemon and orange rind and juice, vinegar, sugar and cinnamon into a
stainless steel, enamel or non-stick coated pan and bring slowly to
the boil, stirring to dissolve the sugar.
Simmer
for 5 minutes.
Strain
the prunes, discarding the tea, and add them to the spiced vinegar.
Simmer
for 3 minutes.
Lift
out the prunes with a draining spoon and pack them into warm,
sterilized jars.
Fast
boil the vinegar for 10 minutes.
Pour
over the prunes, cool, then cover with vinegar proof screw or clip
on lids.