Hayley, well it looks to me like you've come to this site to research and ask questions, take this beast by the horns yourself, and find out what is best to ask about when at the neurologist, so as far as I can tell tell, you're doing the right stuff! Questions are good - essential in fact.
Now it is up to us to answer your question about ideas on treatment. I'll take my stab at it and let's see what others have to say also.
From what I've seen amongst the informed clusterheads on this site, O2 does appear to be most widely accepted and popular abortive. For a whole lot of us it needs to be administered as outlined in the
oxygen info link on the left of this page in order to be truly effective, which is not likely the way your neuro will prescribe it. You can decide whether you want to push the Hi LPM/non rebreather issue with the neuro - personally I'm happy just to get whatever the doc will write on the script, so I can just get the O2 and then take it from there.
Injections. Your neuro mentioned injections. I figure that must be Imitrex. Hey you may have a decent neuro there because that's a WAY better form of imitrex for CH, but a lot of doctors don't know it and prescribe pill form, which isn't for CH.
I swear by Imitrex when the O2 fails or isn't accesible. Others swear at it. It is very effective at aborting attacks for a very high percentage of patients, but it is expensive and IMO should be used just as your backup plan, with the emphasis on O2. You'll cut way back on the expense and side effect risk by adhering to this critical imitrex tip:
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Then there are preventatives like high dose Verapamil that some have success with. I haven't tried it at a high dose, so I have no personal insight there.
That oughta get you started on your studying up for the neuro appointment, then after that's over, there are non drug/medical treatments that the neuro would be clueless about, but we could go ahead and have a real blabfest about.

[Edit] Just noticed that you're in Liverpool, so the expense of Imitrex may not be an issue, but you'll still want to take 1/3 to 1/2 injection doses to lessen any side effect or overdose risk. Also I believe it will be called "Imigran" there.