The only mention I can find is probably what you are already aware of.
"In Usherforce sector, in the north, the 6th Green Howards and detachments of the 3rd Searchlight Regiment, who guarded the bridges at Gravelines and for three miles to the south, held off all attempts by the German 1st Armoured Division to seize the bridges, till they were relieved during the day by French infantry and artillery.[6] At St Pierre Brouck a detachment of the 1st Super-Heavy Battery, fighting as infantry, held off for several hours other troops of the German 1st Armoured Division which began their attacks on the bridge at dawn; but the gunners were forced back late in the morning. Another party of gunners—of the 3rd Super-Heavy Battery—held the crossing at Watten against a German armoured reconnaissance battalion till they were relived late in the day by French infantry.[7] The 52nd Heavy Regiment similarly fought as infantry at St Momelin until French troops releived them on the night of the 25th. Usherforce then withdrew to Bergues to strengthen the French garrison there. From St Omer southwards to Raches Polforce was in command, with Woodforce holding Hazebrouck. Macforce was already moving up to strengthen the defence where the enemy were across the canal between St Omer and the Forest of Nieppe.[8] The divisions now being freed from the main eastern front (2nd, 44th and 48th) were to take over the defence of the Canal Line as soon as possible."
From:
http://ibiblio.org/hyperwar/UN/UK/UK...landers-9.html