< src="http://whitesplumbingandheating.co.uk/wp-content/uploads/2012/09/WhitesFeature_CH2-300x125.jpg" class="attachment-medium size-medium" alt="Radiator TRV" srcset="http://whitesplumbingandheating.co.uk/wp-content/uploads/2012/09/WhitesFeature_CH2-300x125.jpg 300w, http://whitesplumbingandheating.co.uk/wp-content/uploads/2012/09/WhitesFeature_CH2-267x111.jpg 267w, http://whitesplumbingandheating.co.uk/wp-content/uploads/2012/09/WhitesFeature_CH2-521x218.jpg 521w, http://whitesplumbingandheating.co.uk/wp-content/uploads/2012/09/WhitesFeature_CH2.jpg 525w" sizes="(max-width: 300px) 100vw, 300px" />