Channel 4’s new 6-part online series, Letters in Lockdown tells six incredible stories from across the UK, as four young people and two well-known faces are inspired to hand-write a letter of love, pride or re-connection to someone who means a lot to them. How will the recipients respond to this old-fashioned and unexpected gesture? Episode 2 features Mathew from Cardiff –  Dear Harvey Matthew is writing a letter to his best friend Harvey, who he has never met. Despite…