The British musician and drummer, Sudha Kheterpal, is proudly cradling her new creation. Called a Spark, it’s the size and colour of a peeled mango and when shaken gently, it makes a noise a bit like a maraca. Sudha made her name bashing out trance-like rhythms with electronic band, Faithless, and with other artists including Dido, Kylie Minogue and The Spice Girls. But now she has decided to adapt her percussive skills to create what…