Len, the trouble is, the front indicators use 21W bulbs. You've replaced them with orange capless 5W wedge bulbs from Halfords.
That's a 16W difference.
The hazards always flash the right speed, don't ask why, I don't know but they do.
You need 21W bulbs in the front. Have you put them in the sidelight holders?
They need to be bright enough to pass the MOT.
If you feel 5W is bright enough, look on eBay for LED (I know you aren't using LED with the capless Halford jobbies) but search for LED bulb resistor.
They go inline and put the resistance back up so they will flash correctly.
HTH.
