Police have released CCTV images of a woman who is wanted in connection with a robbery at Yorkshire Bank, High Street, Grantham, on April 30.
At around 2.30pm a woman entered the premises and demanded money from staff. She claimed she had a gun but no weapon was seen.
The woman made off with a quantity of cash and was seen turning right out of the premises onto the High Street, towards Vine Street and the Angel & Royal Hotel.
She is described as wearing black vest top, black trousers, and had a black coat over her head. She had dark hair, was of medium to large build, and was thought to have been aged around 30 or 40.
Anyone who may have seen a woman matching that description, or who may have seen or heard anything suspicious around the area of the bank at the time, is asked to contact police.
Yorkshire Bank are to make changes to their network, affecting nine branches across our region.
Branches in Bingley, Bradford, Goldthorpe, and Thirsk will be replaced by new sites at Keighley, Shipley, Mexborough, and Northallerton. Scunthorpe's branch will change but it has not been announced where the replacement branch will be located.
Hull's Bransholme branch will move to Holderness, while the Armley branch in Leeds will be replaced by one in Bramley.
Two branches in Sheffield at Haymarket and The Moor will close to be replaced by one on Fargate.
Union bosses have criticised Yorkshire Bank's decision to close some branches and create flagship sites instead.
The Bank say no jobs will be lost as a result of the changes but critics say taking banks off the high street will not help customers.
Clydesdale and Yorkshire Banks are to close 28 "unsustainable" branches and invest £45million in customer improvements under plans to reshape their retail banking operations.
Six "flagship" branches will be developed as well as improved mobile and internet banking services under a programme to "replace, renew, relocate and reinvest" across the retail branch network.
The company say it will save £5 million by the branch closures, adding that frontline jobs will be safeguarded.
New posts are being created at the banks' busiest branches, while support will be given to displaced branch managers.
The Clydesdale and Yorkshire banks are to cut more than 1,400 jobs in the UK, their owner, National Australia Bank, has said as it restructures its business. To find out the full picture across the UK click here.