The following is based upon over an hour's web research, so I hope that I've got it right!
Alba don't use the Goodman's brand name for kitchen products within the UK. Instead, they use the 'Breville' badge. The Goodman's GBM625 model, which was sold by Tesco, was almost certainly intended for sales outside of this country.
In the UK, this breadmaker is badged as the Breville BR8 (or, it seems, as the 'Anthony Worrell Thompson by Breville' BR8L).
The Breville UK website doesn't offer any downloads but you could try phoning Customer Services on 0161 621 6900 or using the form, here:
http://www.breville.co.uk/contactus.html
If you contact Breville, I suggest making no reference to the Goodmans name. Simply ask about getting hold of a manual for the Breville BR8 but, before doing so, please check that your breadmaker really is the same as the Breville model and that I'm not (unwittingly) writing absolute b0ll0cks!
BR8 picture here:
http://www.theukstore.co.uk/5-3147511-B0000C78 XL-Breville_BR8_Bread_Maker.html
BR8L here:
http://www.breadmakers.me.uk/breville/breville -br8l-anthony-worrell-thompson-professional-br eadmaker-review/
Chris