Royal Mail nationwide postal strike

Glasgow: Royal Mail workers picket the Glasgow mail centre Photograph: Jeff J Mitchell/Getty Images

London: Royal Mail employees form a picket line outside Mount Pleasant sorting office Photograph: Oli Scarff/Getty Images

Manchester: Postal workers wave to passing motorists as they stand on the picket line outside the Manchester mail centre Photograph: Phil Noble/Reuters

London: Royal Mail employees form a picket line outside Mount Pleasant sorting office on the first day of a 48-hour nationwide postal strike called by the Communication Workers Union Photograph: Oli Scarff/Getty Images

Coventry: Postal workers picket the Royal Mail centre Photograph: Rui Vieira/PA

Bristol: Striking postal workers cook food on a picket line outside the Bristol mail centre Photograph: Matt Cardy/Getty Images

Coventry: A Royal Mail postal worker and picket banner outside the centre Photograph: Rui Vieira/PA

London: Royal Mail employees, believed to be managerial staff, load a van with mail in Mount Pleasant sorting office on the first day of a 48-hour nationwide postal strike Photograph: Oli Scarff/Getty Images

London: A postal worker wears a badge outside the East London mail centre Photograph: Graham Turner/Guardian

Maidstone: Royal Mail lorries parked at a sorting and delivery office in Kent Photograph: Gareth Fuller/PA

Warrington: Royal Mail staff make hot drinks at the North West distribution centre, Cheshire, on the first day of nationwide strikes by postal workers Photograph: Dave Thompson/PA

London: A steward on the picket line outside Croydon's Royal Mail sorting office Photograph: Frank Baron/Guardian

Birmingham: Postal workers picket the city's main sorting office as they start two days of nationwide industrial action Photograph: David Jones/PA

Glasgow: A striking postal worker stands outside the Royal Mail sorting centre Photograph: Danny Lawson/PA

London: Mail is collected from Mount Pleasant sorting office Photograph: Ray Tang/Rex Features

London: Picket line at East London mail centre Photograph: Graham Turner/Guardian

Warrington: Postal workers picket outside the North West mail distribution centre Photograph: Andrew Yates/AFP/Getty Images

Bristol: Striking postal workers watch a lorry pass on a picket line outside a mail distribution centre Photograph: Matt Cardy/Getty Images