Were "Nu (sic) Labour" in power in 1831 then Deldays?
http://en.wikipedia.org/wiki/Game_Act_1831
What New Labour actually did (in 2007) was to change the law to state that there were no "season" for certain game anymore; but kept the 170 year old rule about Sundays and Christmas Day. They also added a new clause saying that it was illegal to purchase game that was killed "illegally" (ergo, on a Sunday or Christmas Day), which is no more than just a protection to the previous law.
http://www.telegraph.co.uk/earth/wildlife/3300337/Game-licences-abolished.html
Read that, it actually states that the Government we backed up the pro and anti-hunting groups in the views on Sunday shooting.