After a uti 12 months ago which took 5 weeks to clear i have been left with a constant urge to urinate and what seems to be urethra irritation.

Highly irregular: That is an extraordinary story! it is possible that you could have scarred your urinary tract with a resistant infection that took a long time to clear. There is such a thing as a constricted urethra that may cause voiding discomfort. Many do not believe in it, but a urologist may be able to stretch out your urethra and resolve your urinary urgency and irritation. Look up oab triggers to avoid, too.

UTI: You might not have cleared the UTI or could have gotten a new infection. Underwear made of synthetic material, soaps or lotions with dyes, or a change in laundry detergent can also irritate the urethra. See your doctor to make sure you are not having a uti.