I would think you have left it a bit late to cruise in March - most will already be sold. But suggest that you look at RCI Rhapsody of the Seas out of HK - she is doing some great little cruises and you can end with a few days in HK. Happy Anniversary.
Why not try princess cruises they are in the far east at that time and are a fantastic cruise line especially for celebrating something like youe 50th anniversary.
Royal Caribbean - Independence of the Seas - 14 Oct 17 - 7nts
Southampton : Gijon : Bilbao : Cherbourg : Paris (Le Havre) : Southampton
Now from £579pp
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P&O Cruises - Ventura - 13 Nov 17 - 11nts
Southampton : Lisbon : Valencia : Cartagena : Gibraltar : Seville (Cadiz) : Southampton
Now from £599pp Was £639pp
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Princess Cruises - Caribbean Princess - 20 Apr 17 - 11nts
Southampton : Guernsey : Cork : Dublin : Hamburg : Rotterdam : Brussels : Paris : Southampton
Now from £999pp Was £1329pp
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