You'll find that's not the bulbs its your dinner, try leaving one normal gu10 halogen bulb in, you'll find they work perfect, this is due to the dimmer allowing just a little bit of current through, not enough to bother halogen but the LEDs will flicker and not turn off.

That dimmer switch would work fine with LEDs. The last time I bought some trailing edge dimmer switches from Screwfix they were £9.95, but I see the same model is now £13.50, so perhaps it was a promotion at the time. The cost of changing to dimmable LEDs and a new switch (if one has a GU10 array) is now such that one would very soon recoup the capital outlay from savings on the electricity bill.

Dimmable LED luminares will almost always need the switch changed to the trailing edge type because the minimum power output from the leading edge type will be greater than the total requirement for the LEDs (unless one has a very large array of LED luminares). Trailing edge dimmer switches are not particularly more expensive than the leading edge type (they are both about £10, maybe a bit less), they just have different characteristics (and would be no good for controlling a ceiling fan for example).
It is a simple job to change the dimmer switches though, and it is not notifiable work.

Did you leave any? :smile: Only the white ones left this morning, scanning at £15.

just bought 4 boxes of 10 warm white dimmable GU10 for £7.50 a box - excellent value!!

For the white units, silver are £7.50.

​the picture is your friend. use it :stuck_out_tongue:

Staff said national, yes warm white.