Vickers Valiant
... that Vickers Valiant XD818 dropped the first British hydrogen bomb as part of Operation Grapple?
... that <b id="mwAoA"><a href="./Vickers_Valiant" id="mwAoE" rel="mw:WikiLink" title="Vickers Valiant">Vickers Valiant</a></b> XD818 <i id="mwAoI">(pictured)</i> dropped the first British hydrogen bomb as part of <a href="./Operation_Grapple" id="mwAoM" rel="mw:WikiLink" title="Operation Grapple">Operation Grapple</a>?