Hi OP, sorry you're in this situation. Here's my experience (sorry if it's long!):
I had an in-person consultation at a clinic where they talked me through the options, performed a scan and took some physical information. I waited a week for that.
At the end of that appointment I confirmed my decision with the midwife, and booked the follow-up appointment to collect the abortion pills from a slightly more local clinic. That further appointment occurred about 1.5-2 weeks later. Tried to get in earlier but couldn't.
All in all it took almost 3 weeks, which I struggled with, considering I'd been seeking an abortion from the moment I found out at 4 weeks. It felt dragged out and I felt terribly guilty to have had an abortion at 3 weeks further along (7 weeks 1 day). I still wish it had been possible to progress things more quickly.
On the other hand, the BPAS staff were all VERY kind and caring, and efficient. I was never aware of any judgement. And I found out afterwards that a same day consultation and pill option is available by prior arrangement (just FYI, wish I'd known this).
I went into it wanting a surgical but the wait was even longer, so reluctantly accepted the medical route.
I took 1 pill at the second appointment (no obvious effects, just makes you feel very sick for an hour or so), and the pessary is taken at home the day after. I was braced for horrendous pain and gore but it was genuinely easy, physically. Took about 4 hours. I got in bed and dosed up on codeine beforehand (definitely recommend this) and didn't feel any more pain than a standard period. Bleeding was very cope-able too.
The hardest part was definitely psychological. I was quite resolute in my decision but it was still gut-wrenching at the time. Even so, I felt all along (bar a moment or two) that it was for the best, and though I think I'll always have the pang of guilt if I stop and dwell on it, it's been 6 months now and, touch wood, hasn't had a lasting psychological impact. I've never regretted the decision.
Hope all goes as well as possible for you. If you have any questions please ask. Good luck xx