I have plenty of twist drills, it was just the brad point/lip and spur wood drills i couldn't find. But thanks to all for taking the trouble to respond.
I've ordered an inexpensive set of brad point drills in 0.5mm increments - £7.99 for the set, free click and collect.
Many thanks for the suggestions.
I'll follow up the ones that aren't too expensive. The Rutlands set would be good value if I needed these frequently and broke them regularly, but I think that one or two of each size will probably last me a lifetime as a hobby woodworker in my mid 70s!
I...
Does anyone know where I can buy wood drill bits (lip and spur type) in 3.5mm and 4.5mm sizes for clearance holes for no6/3.5mm and no 8/4.5mm woodscrews? They are the commonest sizes I use, but all the on-line sources I can find only sell sets or individual bits in whole mm sizes - typically 3...