Most hybrids needs the engine to run for heat. So if your running short trips, you never use the electric when the weather is cold. Also you still have to pay road tax, congestion charge and some areas charge hybrids for residents permits, but exempt pure electric. Hybrids have higher servicing costs and more complex things break often. They are the great idea for that one or two journeys in a year, but for the rest of the year the hybrid's range would be wasted.
And if you really need the range for that once a year trip - hire a car, it would still be cheaper in the grand scheme of things and the once wise words from Jeremy Clarkson: "The fastest car is always a rental"