UK gallons
A UK gallon is a unit of volume used in the United Kingdom for measuring liquids such as fuel and water. One UK gallon is about to 4.54609 liters or 0.16054 cubic feet making it substantially larger than the US gallon.
Tablespoons
There is more than one type of tablspoon:
One US tablespoon is equivalent to approximately 14.8ml: US tablespoon
One UK tablespoon is equivalent to approximately 15ml: UK tablespoon