Two, according to the illustration on page 249 of Landstrom's "The Ship".
My favorite illustration in that book, of the Barham.
WEM made a kit in 1/700 of Warspite.
They appear to be kind of shallow affairs, maybe so she could ride in over the Heligoland Bight at low tide.
Or miss the Firth of Forth bridge.
A very lovely ship.
my current little ship project is curiously connected:
Here's Pietro and Paolo. Ready to go sink HMS Queen Elizabeth.
Italeri 1/35 Siluro Lenta Corsa "Maiale" (pig). The Decima Flottiglia had some brio.
I just love this kit. It was the most expensive cigar I've ever bought at $ 45.00, but what a fun build so far.
The booklets that Italeri now include are really well done, and the PE, clear styrene and detailed castings really make it.