Thank you both for replying (and so fast). I'm presently sifting my way through the marriages and baptisms from Frome (had to start somewhere).
I've been working my way back from my dad, who died 8 years ago Dad knew nothing about his family at all, his father didn't talk about his parents so i've had to work from certificates and census information only.
Stephen Alfred Portch (1894-1957), son of John William Portch (1864-1917) and Mary Cecelia Sapsford (1864-1899).
John William's father was Stephen Hunt Portch. This was acknowledged in John William's marriage register, which said Stephen Hunt Portch was a carman, in London.
I've gone backwards through the census and found in 1851 a Stephen Portch, from Frome in Somersetshire (at that time an agricultural labourer), living at 143 Broadway, Trinity, Frome, Somerset - but his father was George!! - now i know this is the wrong man - so will have to look again for the correct census information.
I've set up a spreadsheet, trying to log information from each census and trying to match householders but now will have to do further searching to see if i can clarify/separate the Stephen Hunt Portch's.
I'll continue to look into this. I've only found ONE Stephen Hunt Portch's death (died Jan-Mar 1894).
Have also found in the Times that a Stephen Portch was imprisoned in 1865 for stealing a sack of malt - he served 6 months.
Lots to look into - thankfully i've got Ancestry membership for a while so i can continue searching in the hope of clarifying some of this data.
I've attached the transcription of Stephen Hunt's marriage certificate - giving Giles as his father.
Thanks again, Lorraine