I would think that this far out, it's unlikely to improve by doing whatever you have already been doing.
I would ask for referral to a Pelvic Health Physiotherapist who deals with men. They are expert on understanding incontinence. They will check that you are doing pelvic floor exercises correctly, and measure strength of your sphincter muscle to make sure it's operating correctly. If you find the waiting list is long, you might consider if you can afford to pay privately, which is probably around £100 for a first (and possibly only) appointment.
If a Pelvic Health Physiotherapist can't help, they will suggest referral back to urology. Urology can check things out with a flexible cystoscopy and urodynamics tests. At one pad a day, you might be a candidate to have a filler injection inside the sphincter muscle.