Mk3 200 Meglio. Need help with horn and airbag.

[Subaru addict]

Hi all I have 59 200 Meglio. Has now developed an intermittent airbag light which is now on more than it is off and also horn almost never works.
Possible squib issue but I'm utterly useless with electrics and after some help in Bracknel/ Berks area to diagnose and maybe code out.
Obviously willing to pay just need to know who to see!
Help please!