MM, the guidelines have now been changed to say that highly allergenic foods, including nuts, shouldn't be delayed much past 6 months. The reasoning is that the longer it is before the food is given, the more likely they will get a lesser exposure from somewhere else (such as being in contact with someone who's eaten nuts), and these lesser exposures can increase the risk of sensitivity developing. There are however two caveats to this:

1. Whole nuts are still a choking risk and shouldn't be given
2. Where there is family history of allergy

In your case, obviously this is an issue. The best plan is to discuss this with a HP to decide what the right decision is for you. Personally I would stick to an HP who specialises in allergies, as most GPs do not. GL.