Without giving too much away about myself, I work in the cancer department at a hospital.
You need to see a GP. You get referred on a 2 Week Wait. There are exceptions to the rule but the NHS have an aim of seeing somebody with suspected cancer within two weeks.
When they give you that appointment, it is only then they will discuss next treatment plans whether that is a CT scan, biopsy, colonoscopy etc. The waiting lists for CT scans especially are extremely high and in a lot of cases people need blood test results back before they can have a scan so the consultant can have all the information possible to give an accurate account on if there is cancer.
There is then a 72 day guideline to make sure people that people who have been referred have had their first appointment, tests, follow up appointments and their first treatments and operations.
You also would not have an operation straight away unless the cancer was causing such serious complications that you are admitted to A and E and they operate then. They try to get you in quick for an operation if needed but waiting times are different for each department and they like to prepare you that you are having an op and you will often need other tests done before this so you will usually have a few weeks before any op takes place unless as I stated, it is an emergency incident.
Obviously this can vary. 72 days tends to be the max.
It is also very unlikely he had radiotherapy and chemo and then chemo or whatever it is you were saying. Both are very very invasive treatments. And it is likely (not in all cases before anyone comes at me!) that a consultant would only want to treat you with one at a time. Chemo and radiotherapy together at the same time is rare although can be done.
As another poster mentioned, the bed crisis is very real. If he is terminal, they will send him to hospice or home and he will only be on treatment to prolong his life. Usually with terminal the aim would be to make him more comfortable so unlikely they would be throwing loads of chemo and radiotherapy at him.
If he is not terminal, he will 100 percent be an outpatient.
So in short, he's lying to you.
I am confused that you said you searched him on Facebook as I thought you didn't know his last name.
But to be blunt, with the information I know about cancer through work and people in my personal life suffering, i have no clue why you would even entertain this. I'm not trying to be rude but it couldn't be anymore obvious that he's lying.