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Thank you all for the very prompt replies. I was briefly interrupted and, when I got back, couldn't get into to A/B - same problem earlier on. Is it just me or has anyone else been suffering...?
Danny - thanks for Anthocarp. I had somehow dredged up Angiocarp and, on re-reading both definitions, am not much the wiser except that one fits the grid and the other doesn't!
All done now...