However , as the fighting continued it further delayed the advance of the relief force .
With Roberts concerned the presence of the infantry forward of the carriers would prevent them employing their heavy weapons , he called to Mollison to order their return .
However , as the fighting continued it further delayed the advance of the relief force , and with Roberts concerned the presence of the infantry forward of the carriers would prevent them employing their heavy weapons , he called to Mollison to order their return .