By Gwyn Wright & Ayaan Ali Broadcaster Chris Packham has told a court he ‘selectively’ supports Just Stop Oil as he stood witness at the trial of an activist. The BBC Springwatch star 62, gave evidence as a defence witness in the trial of 22-year-old Cambridge music student Cressida Gethin, who scaled a gantry above the M25 near Heathrow as part of a protest by the group. The defendant denies one count of causing a public nuisance contrary to the Police, Crime, Sentencing and Courts Act 2022. She does not dispute scaling the gantry but denies that it amounts to the charge. Mr Packham was among…