Thanks to all who've helped on this forum.
The outcome was that they packed out the fascia board under the join so that it's better.
However, they finished off the barge-board/front fascia corner on the other side and it's revealed a similar problem. I don't think there is a 90 degree angle...
Thanks for the lightning quick response. :)
No it wasn't the cheapest quote - we went for them because their website stressed the high quality professional workmanship from a firm who've been doing it for 35 years and "well known for the sheer quality of our work".
Just had a firm to replace UVPC soffits fascia and bargeboards. On the back of the house the fascia is bowing out and two joined sections don't align, and the joint cover won't lie flat.
I'd be very grateful if a professional on the forum can tell me if they think this is acceptable...