Would Brunel have made HMS Warrior a two-decker?

If Brunel had followed Great Britain with responsibility for HMS Warrior, would Warrior have become a two-decker?

Probably not; Warrior's deck count depended more on the size of the French Gloire and the Royal Navy's desired margin of superiority than on the individual designer.

The Royal Navy considered a second gun deck for Warrior but judged it unnecessary against the smaller Gloire. Avoiding it saved money and avoided a possible tumblehome hull that officials thought looked old-fashioned. Warrior already approached twice Gloire's displacement, so a larger French opponent would be the stronger reason to demand a larger British ship. The available British categories are described as single-deck frigates with roughly 40-50 guns and two-deckers with roughly 96-110. A three-decker of about 150 guns offered little attraction in this account. Brunel's appointment alone would therefore be unlikely to change the chosen deck arrangement.