At service, informed that the catalyser heat shield was corroded - both upper and lower.
As you know, I get everything done that is suspect on my Steppy.
Ian@bongofury could not supply, and Honda UK state that this (these) items are discontinued.
Enter jp-carparts.com - they had the items in stock @ $42.09 each - part nos 18181-PNC-000 and 18182-PNC-000.
Ordered, and was charged about $50 for DHL delivery.
Despatched Monday 14 july from Japan - in Hong Kong within 9 hours - but Hong Kong charged £27.00 tax!
Estimated delivery, however is Friday 28th July. Hope it's right.
Excellent service - thank you jp-carparts.com.