These are both possible late-onset side effects (meaning not starting until at least 3 months after treatment, but can be years later), known respectively as radiation cystitis and radiation proctitis.
For the radiation cystitis, I would start by getting a urine dip test done, looking particularly for infection markers (although these aren't reliable in dip tests), and also for microscopic hematuria (traces of blood too small to see). In case of infection, you may need some antibiotics, and drinking cranberry juice might also help. Any case of hematuria needs referring back to urology on a 2 week wait, just to confirm is it radiation cystitis and not something more serious.
For radiation proctitis, you would be referred to colorectal, again for them to confirm this is the cause, and not something more serious. If you pass blood, this would also be on a 2 week referral.