There has been a wave of by-elections in recent months across the country - and Sky’s chief political correspondent Jon Craig has been to most of them. In fact this Thursday sees Jon covering his 40th count for Sky News. He’s in Nadine Dorries' old seat of Mid Bedfordshire which could see the vote split 3 ways between the Conservatives, Labour and the Lib Dems.On the same day, another seat held by the Conservatives – Tamworth – is up for grabs following Chris Pincher’s resignation over groping allegations.But what if anything do by-elections results tell us about potential general election outcomes? On a bonus episode of the Sky News Daily, host Niall Paterson talks to Jon Craig about that, and his highlights of covering by-elections for so many years. Podcast producer: Alex Edden Senior podcast producer: Annie Joyce Editor: Paul Stanworth