Actually, it went rather well. The bottle of Tio Pepe lasted nearly three hours (OK, that includes the hour or so in the fridge getting it down to temperature), far longer than the usual white wine or Cava would - being mainly red wine drinkers anything light and white tends to go down like cold lemonade on a hot summers day. The Sherry demanded to be savoured, and it was. It also went very well with the rather disappointing tapas, cutting through the oiliness of the olives and tomatoes. I remember now why I usually avoid tapas - it never quite seems to deliver compared with more traditional finger food. We did compensate by knocking up a batch of anchovy palmiers which went down even better with the Tio Pepe. Anyway, mission accomplished - all food chores completed and first bottle of sherry thorough tested. The second bottle, an even dryer Manzanilla, awaits Sunday lunchtime when the festive ham comes out of the sous vide after 12 hours at 60 deg C. May just skip breakfast!
Incidentally
@Lullabelle, it seems that tapas originates from the vineyards of the Sherry producing area of Spain. The word literally means "cover", a slice of ham used as a lid on a glass of Sherry to keep out the fruit flies, thus the pairing started. Give it a try!