Healing can vary between people but she is looking at 8-24 months in all honesty. Out of everything they have been known to cause some of the most amount of trouble, I have one that took over two years to heal then flared up again almost ten years later and is now on the verge of being taken out, this again is quite common. Then again the other one was healed in 8 months and has never given me any trouble in 8 years.
If you want to increase the chances of an easy heal then ask for a PTFE bar with Ti balls on the ends, it's slightly flexible and also one of the most bi-compatible things around, which is why they use it to make fake veins.
In Birmingham you want to be heading to modern body art, I think they are still down by the kids hospital in the centre of town although it is over 3 years since I have been. Really clean and friendly people.
If she wants to learn more about it check out http://www.bmezine.com it isn't quite what it used to be but is still a wealth of information about this kind of stuff..