< src="http://whitesplumbingandheating.co.uk/wp-content/uploads/2014/09/229751-300x220.jpg" class="attachment-medium size-medium" alt="Worcester Boilers 6" srcset="http://whitesplumbingandheating.co.uk/wp-content/uploads/2014/09/229751-300x220.jpg 300w, http://whitesplumbingandheating.co.uk/wp-content/uploads/2014/09/229751-1024x754.jpg 1024w, http://whitesplumbingandheating.co.uk/wp-content/uploads/2014/09/229751-267x196.jpg 267w, http://whitesplumbingandheating.co.uk/wp-content/uploads/2014/09/229751-521x383.jpg 521w" sizes="(max-width: 300px) 100vw, 300px" />