Repointing Brickwork – When weathering and rot have made your brickwork look untidy and unsafe, you might need to call on a bricklayer or repointing expert to put the job right and make your brickwork look like new. Make sure you get someone who knows what they are doing because it is not a job to be taken lightly, the mortar need to match the old mortar and the joints need to be profiled correctly to avoid future weathering. You should not attempt to do this yourself or bring in a handyman type person who is not qualified in the skills of bricklaying. When you contact a bricklayer, try to get photos of brickwork and repointing that they have previously done so that you can check the quality of their work. Hopefully you should have your tatty brickwork looking pristine again in no time.
More details here: https://www.brickery.uk
Bricklaying in Scotland: Bricklaying and Brickwork