07:15Strange Weather DaysSeries 2Episode 2: What a Scorcher!BBC Radio 4 Extra Duration: 15 minutes Sun 22nd Jan 2012, 07:15 on BBC Radio 4 ExtraMeteorologist Helen Young visits Cheltenham to recall the UK's hottest ever temperature of 1990, when tarmac started melting.GenresFactualScience & NatureBrandStrange Weather DaysSeriesStrange Weather Days: Series 2 Source: BBC Online