According to that web site the roll of Honour has been re-erected inside the new store of Goodfellows-it's a wooden roll of Honour called Sharp Street Shrine.
However on reading further into this website, in 2007, the shop to which this memorial is attached ceased trading, and the building was put up for sale.
http://www.thisishullandeastriding.co.uk/Traders-unite-launch-Newland-Market/story-11973930-detail/story.htmlIt was then bought by three builders who opened the premises in 2009, as Newland Street Market, but this also seems to have fallen through, because I now see that there are now plans for the Erection of 15 terraced 2.5 storey houses, with 23 parking spaces at rear, by a company called Newland (Wyke) Molescroft Nursing Home (Holdings) Ltd, C/o Agent Mr Christopher Kendall, Hickling Gray Associates, 61 Langdale Road, Market Weighton ,York, YO43 3DG
So suggest that you contact that company above and see if they have any knowledge of the plaque, the local library, Hull City Council Archives, or maybe the above newspaper site-they may have an angle on your story.
Tom