1 Infection: Blood in the urine can be a sign of urinary tract infection (UTI). An infection can be present in the lower urinary tract (bladder and urethra) or higher in the urinary tract (kidneys or ureters).  Nephrolithiasis: Kidney or bladder stones may form inside the urinary tract and can cause bleeding into the urine.
From 12 November 2015, however, if a person with at least 12 months of permanent residence wishes to apply for British citizenship he or she first has to apply for a permanent residence certificate or card. This change was introduced by the British Nationality (General) (Amendment No. 3) Regulations 2015 (SI 2015/1806).
To do this, you will need a Permanent Resident visa. This visa allows unlimited duration for your stay, meaning you don't have to keep on renewing your visa (however, you have to renew your resident card every 7 years).