There categorically are not plenty of them around. Really, you'd have to be a fool to call any pitch in England outside the middle 3 in 2004 a turner, because since covered pitches the turning pitch in England has been an extreme rarity - before 2004 we'd not really seen one since The Oval 1997.
Certainly there's no way whatsoever that any of Old Trafford 1998, Edgbaston 2001, Edgbaston 2002, Old Trafford 2002, Edgbaston 2003, Lord's 2003, Trent Bridge 2003, The Oval 2003, Lord's (New Zealand) 2004, Headingley 2004, Old Trafford 2004, The Oval 2004, Lord's 2005, Trent Bridge 2005 or The Oval 2005 turned for more than the odd ball at any point in the game (for fingerspin).
Giles' first 7 overseas Tests were all in the subcontinent, and all on turning pitches. He bowled poorly on 2 of them (First and Second in Sri Lanka 2000\01) and well in the rest. Then he played at Bangalore which was a seamer's paradise without any turn, 3 in New Zealand where there was barely any turn whatsoever, The 'Gabba where there wasn't, 2 more in Sri Lanka where there was and he did very well, 1 in Sri Lanka which could fairly be called the flattest pitch ever, 3 in West Indies which didn't turn at all, 1 in South Africa which did (and he did well on) and 4 that didn't, and 2 more in Pakistan which could again be called as flat as a pitch can be.
If you generalise, you make mistakes. Unless you look at all the material, you won't understand the truth of the situation.
Let me assure you, Boje's wasted turning pitches before now, too. See Sri Lanka 2004.