Thanks for the responses, and sorry for the delay - I've enjoyed reading your advice and anecdotes.
Yep I've got two EpiPens now which are always at the ready. And as much as a wasp sting does really sting, it's nothing to the allergic reaction I assure you! Very nasty and scary.
As far as I know the nest was in the eaves space, rather than visible in the loft - do you know if the spray would still be effective if it was aimed in the general area of the nest? There must be a point where the wasps are getting in and out of the loft. (I'll send someone else up, I'm not going near it!).
Yep I've got two EpiPens now which are always at the ready. And as much as a wasp sting does really sting, it's nothing to the allergic reaction I assure you! Very nasty and scary.
As far as I know the nest was in the eaves space, rather than visible in the loft - do you know if the spray would still be effective if it was aimed in the general area of the nest? There must be a point where the wasps are getting in and out of the loft. (I'll send someone else up, I'm not going near it!).