What is it?

[wscherf]

On the inside back cover of the current WATER CRAFT (May/June) is a nifty looking sailboat. Carries an "X" on the sail. Has also appeared in a number of back issues. What is it? (Please don't tell me it's an "X" class sloop).

[Jeremy Burnett]

The X class sloops were designed by Westmacott and are one of the most popular one design keelboats around, mostly in the Solent,always one of the largest classes at Cowes week.