Yes, it's especially stupid when you consider the UK is an isolated little island that doesn't have enough natural resources to meet the needs of it's population (and unless that is drastically reduced never will).
We are at the mercy of other countries, specifically developing ones, to feed, water, power, and enjoy ourselves. We may remain relatively isolated from the impacts while the global capitalist market is still operating (and we are one of the richest countries) but there is a tipping point where that stops and climate change is rapidly adding weight to just one side of the scale.
Just look at food production. Today we grow approximately 170 crops on a commercially significant scale, depend highly on only about 30 of them to provide us with calories and nutrients that we need every day, with more than 40% of all human consumed calories coming from just three staple crops: rice, wheat and maize (corn).
Corn yields are predicted to decline by 24% by 2030, rice yields decline roughly 10% for every additional degree of temperature rise (and are already being severely impacted by changing weather patterns), wheat production is actually predicted to rise but not by enough to cover the other two loses (17%). Similar patters are present in all commercially significant food crops.
While developing country leaders may be happy to subject their populations to lower standards of living in pursuit of economic growth, by selling their products to developed countries, the populations themselves won't willingly accept starvation, so once yields are reduced enough to tip those in poverty into famine the global markets will stop functioning, as will our abundant food supply.
What are all those "I don't care about things happening over there" posters plans for when global food systems collapse?
Also for all those going on about the UK only accounting for 1% of emissions, please read the work the Global Carbon Project / Future Earth and Carbon Breif do in this area to understand why this is irrelevant.