Hi, I can confirm the ex-mother & baby home in Harlestone Road was called Elmleigh.
I worked there as gardener & general repairman 2.5 days per week from 1971 to 1974.
My employer was extremely 'well heeled', a Lady Glover, from Pychley House near Kettering. She owned a string of racehorses & land.
I can confirm I found the place very friendly & well run, and people from wealthy backgrounds & 'ordinary' folk alike resided at the home. It definitely wasn't cheap; I distinctly remember most folk had to work in various jobs to 'fund' their stay, if that makes sense. It was run by 3 VERY wealthy women, who, although very courteous & polite (to me), seemed to me would not stand for any nonsense or disagreement from anyone i.e. What they said goes, full stop. It was definitely - rightly or wrongly - a business, the sole purpose providing healthy babies for adoption - probably to wealthy couples who were unable to produce a child of their own.
There were a lot of people who came & went - many more than you would imagine. In the late 1970's I believe it was turned into student accommodation & then in the 90's sold & converted into private residences/offices. From what I remember one of the women who ran it, perhaps she was an accountant, hardly ever came out of the 'office' - the first door on the right after entering from the main outside doorway - she was always doing the books & on the telephone. This room was opposite the main kitchens, ground floor, and there was a payphone on the wall outside. I am almost certain it was a privately run business, but I am not 100% sure, & I have read somewhere on this forum that it was run by National Adoption Agency. Well I have lived in Bournemouth on the south coast for the past 32 years, but I was visiting friends in Corby last summer & drove past to have a look... It is still there & the exterior of the building looks exactly the same, however, some of the vast garden & lawns have disappeared & are now parking spaces for cars. Best wishes to all who read this, & I hope your memories of this place are good & not bad.