THE net is closing in on a gang dubbed the “Peaky Blinders” after scores of high-value jewellery heists. Flat-capped robbers stole £26.5million worth of gems at a fine art fair last summer. Four of the five robber wore flat caps like the Peaky Blinders CCTV showed four dressed like the BBC gangsters attacking the stand of London jeweller Symbolic & Chase in the Netherlands. Three…