Unite national officer Rob MacGregor said the move would be "concerning" for local communities which would be left with less choice in banking services.
Unite has published a list of the branches expected to close:
Car park hole: 'No risk to public' says Environment Agency
A hole that appeared in the car park of a Sheffield shop yesterday is being closely monitored by the Environment Agency.
Environment AgencyCopyright: Environment Agency
The Environment Agency says they're sending contractors to remove rubble from the hole which will reduce the risk of water from a stream beneath causing problems.
They say that there is no further risk to the public.
Leeds bomb hoax: Man arrested after 'significant disruption'
A man has been arrested over a bomb hoax which saw a large area of Leeds city centre cordoned off, the Victoria Gate shopping centre closed and bomb disposal officers called in this morning.
BBCCopyright: BBC
A 35-year-old man is now in custody after a police investigation.
A controlled explosion was carried out by the army while nearby shops and offices were evacuated.
Quote Message: Clearly this caused significant disruption to people living and working in the city centre and to local businesses." from Ch Supt Paul Money West Yorkshire Police
Clearly this caused significant disruption to people living and working in the city centre and to local businesses."
Traffic and travel: Rush hour across Yorkshire
BBC Travel
We're right in the middle of the evening rush hour, so how does your journey home look tonight?
Slow moving on the A1079 Lawrence Street in York because of an accident
Leeds bomb hoax: Man arrested
A man has been arrested in connection with a bomb hoax in Leeds this morning.
BBCCopyright: BBC
Bomb disposal officers were called to the Victoria Gate shopping centre at about 08:40 this morning, a large area was cordoned off and the shopping centre was closed.
The device was declared safe around lunchtime and the area is fully reopen.
A 35-year-old man is currently in custody.
BreakingArrest over Leeds 'bomb hoax'
A man has been arrested over the incident in Leeds city centre earlier which saw roads and a shopping centre cordoned off.
More to follow.
Have you seen this missing Bradford man?
Have you seen Janis Graveris? He has been missing from his Bradford home for five days.
West Yorkshire PoliceCopyright: West Yorkshire Police
The last sighting was last Friday, at the Sainsburys Local shop on Great Horton Road.
The 29-year-old is Eastern European and was wearing a brown sports jacket, blue jeans and brown leather shoes.
York community stadium to go ahead
York's community stadium will now go ahead after a legal challenge against a cinema on the development has been lost.
City of York CouncilCopyright: City of York Council
Live Reporting
Elly Fiorentini, Mick Lunney and Nick Wilmshurst
All times stated are UK
Get involved
- Second arrest in Rotherham over teenager's death
- Partial victory for disabled bus users
- Arrest over Leeds bomb hoax
- Work to start on York Community Stadium after legal delay
- RSPCA reveal South and West Yorkshire dog fighting hotspots
BBCCopyright: BBC 
Environment AgencyCopyright: Environment Agency 
BBCCopyright: BBC 
BBCCopyright: BBC - Queues on the M62 westbound at J28, A650 (Tingley).
- Lane blocked between Leeds Inner Ring Road A660 and Willow Terrace Road, because of an accident.
- Slow traffic on A61 St Mary's Road in both directions in Sheffield
- Queues on the A6102 Greenland Road southbound in Sheffield
- Slow moving on the A1079 Lawrence Street in York because of an accident
BBCCopyright: BBC 
West Yorkshire PoliceCopyright: West Yorkshire Police 
City of York CouncilCopyright: City of York Council
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Read moreToday's headlines
This live stream has now ended - but you can get all the latest news from across Yorkshire for today here.
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Read moreOur top stories across Yorkshire during the day
Nick Wilmshurst
BBC Local Live, Leeds
We'll be back tomorrow from 06:30 with all the latest news, sport, weather and travel for Yorkshire.
Major updates on news, sport, travel and weather will continue through the evening and night on the site.
Let's look back at some of our top stories from today:
BreakingBank group closure plan revealed
The Clydesdale and Yorkshire Banking Group (CYBG) is reported to be closing 79 branches with the loss of 400 jobs.
The Unite union said the closures represented a third of the bank's total branch network.
The move was described as the largest-ever closure plan by the bank.
Unite national officer Rob MacGregor said the move would be "concerning" for local communities which would be left with less choice in banking services.
Unite has published a list of the branches expected to close:
Yorkshire Bank: Alfreton, Barnoldswick, Bradford West Bowling, Burton-Upon-Trent, Chadderton, Cleveleys, Clitheroe, Coalville, Crewe, Filey, Gateshead, Goole, Guisborough, Hinckley, Hull Hessle Road, Knottingley, Leamington Spa, Leeds Central, Leeds Chapel Allerton, Leeds Headingley, Leeds Woodsley Road, Leigh, Middlesbrough Berwick Hills, Newark, Normanton, Norton, Nottingham Bulwell, Ossett, Pickering, Retford, Richmond, Ripon, Royton, Sheffield Broomhill, Sheffield Firth Park, South Shields, Todmorden, Wath upon Dearne and Wellingborough.
A list of Clydesdale branches in Scotland Unite believe will close was also revealed.
Legal challenge to stadium plan fails
A legal challenge over plans for an 8,000-seat community stadium complex fails.
Read moreCar park hole: 'No risk to public' says Environment Agency
A hole that appeared in the car park of a Sheffield shop yesterday is being closely monitored by the Environment Agency.
The Environment Agency says they're sending contractors to remove rubble from the hole which will reduce the risk of water from a stream beneath causing problems.
They say that there is no further risk to the public.
Barnsley sign Everton defender Jones
Barnsley sign Everton defender Gethin Jones on loan until the end of the season.
Read moreLeeds bomb hoax: Man arrested after 'significant disruption'
A man has been arrested over a bomb hoax which saw a large area of Leeds city centre cordoned off, the Victoria Gate shopping centre closed and bomb disposal officers called in this morning.
A 35-year-old man is now in custody after a police investigation.
A controlled explosion was carried out by the army while nearby shops and offices were evacuated.
Traffic and travel: Rush hour across Yorkshire
BBC Travel
We're right in the middle of the evening rush hour, so how does your journey home look tonight?
Here are the main pinch points around Yorkshire:
West Yorkshire
South Yorkshire
North Yorkshire
Leeds bomb hoax: Man arrested
A man has been arrested in connection with a bomb hoax in Leeds this morning.
Bomb disposal officers were called to the Victoria Gate shopping centre at about 08:40 this morning, a large area was cordoned off and the shopping centre was closed.
The device was declared safe around lunchtime and the area is fully reopen.
A 35-year-old man is currently in custody.
BreakingArrest over Leeds 'bomb hoax'
A man has been arrested over the incident in Leeds city centre earlier which saw roads and a shopping centre cordoned off.
More to follow.
Have you seen this missing Bradford man?
Have you seen Janis Graveris? He has been missing from his Bradford home for five days.
The last sighting was last Friday, at the Sainsburys Local shop on Great Horton Road.
The 29-year-old is Eastern European and was wearing a brown sports jacket, blue jeans and brown leather shoes.
York community stadium to go ahead
York's community stadium will now go ahead after a legal challenge against a cinema on the development has been lost.
A rival chain asked a judge to look at the planning decision - because the new multiplex on the site at Monks Cross will be bigger than originally approved.
But that's been thrown out this afternoon at the High Court - meaning work can now start.