This visualisation of temperatures in Lancashire (UK) shows annual mean data from 1754-2015. The long-term warming trend is clear, with variability from year to year, and some temporary cooler periods due to large volcanic eruptions. The average of the 19th century (black line) separates the warm and cold colours.
This image will be displayed as part of the Into The Blue science festival in Manchester in October.
Small technical detail: The Lancashire timeseries in Gormally et al. ends in 2007. The 2008-2015 data is from Central England, shifted to account for the small mean differences between Lancashire and Central England. The correlation between the two datasets is very high.