Just doing some bits in the pleasant sunshine and the warning lights (brake, mainbeam, indicator etc) are not very visible. Any "bright" ideas or is it not a problem for the IVA?

How about some sort of shroud over the lights to put them shadow.

Shouldn't be a problem for IVA as they'll be checked indoors (and it'll wee down on the dayof your test...sods law). What lights are they? It may be possible to use higher wattage bulbs but beware of the extra heat they'd produce.Otherwise a shroud over them helps to keep the sun off.