Hi all , sorry for the delay in getting back to you.
Yes the kindly church office girl came back to me with the confirmation that a Robert DOWNEY was baptised on 20th Jan 1828 at Dromore RC Church to a James DOWNEY and Margaret CROTHERS.
The question is of course is this MY Robert Downey.
I have looked through the Catholic records on-line for Dromore back to 1823, but no marriage for James and Margaret. It was noted on Robert's baptism that his mother Margaret came from Magherabeg so I thought she may have married James back in her home town, but apparently the marriage would probably have taken place in Dromore as it was the parish church for that area.
Unfortunately the marriage records for Dromore Church only go back to 1823, so while Robert was born 1828 and a brother in 1832, they could be the last of a dozen children going back before 1823, meaning James and Margaret could have been married well before 1823.
Will keep looking and advise you of any more news.