Thanks Mike, I'll look this up, but have since googled and a possibility is
SLOE

Will check your answer out though
"Mike" wrote in message
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ALOE ?

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H.M.S.Collingwood Ass. Llandudno 20 - 23 May Trip to Portmeirion
National Service (RAF) Ass. Cosford 24 - 27 June Spitfire Fly Past
H.M.S.Impregnable Ass. Sussex 1 - 4 July Visit to Int. Fest of the Sea
British Pacific Fleet. Derby 2 - 5 Sept. Visit to Denby Pottery
"Janet Bennett" wrote in message
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Medicinal Shrub - 4 letters - ??O?

Thanks

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Jan