Many times, a pipe tamper will have a cross-hatched design on the bottom. Take a look.
Also just a word of caution. The UK has really tightened up the rules and upped the penalties for taking items out of the country without an export license. The reason I am saying this in regards to this object is that when an export license is given, the item has to be photographed and identified BEFORE leaving the country. It would not be good to spent some time in the UK for free - courtesy of the government.
If it is not a pipe tamper, it may have been a decorative object to hold something closed in an outdoor garden or fence.
Daryl