Just back from a few nights in Sweden to find the perfect programme on Radio 3. It was one of those interval shorts that are always such a nightly bonus during the Proms season. That 20-minute space between concert halves is the perfect length for listening. On Sunday night it was Kate Clanchy’s turn to fill in between Sibelius symphonies and what better topic than The Summer House (produced by Julian May), or rather the stuga, mokki, sommerhus or dacha beloved of Scandinavians and Russians, where Sibelius would retreat to write those symphonies redolent of dark woods and deep waters....