looking for a new insurer due to greatly increased premiums on two cars

Hello everyone. I was wondering if you lovely people could try and assist me in getting some better cover for the two cars in my household? As my premium has jumped from £700 P/Y to £910!

Here's a bit of backstory - I'm 41 (male) and primarily use our 09 Reg VW Golf 2.0 TDI auto (140 Bhp) average between us on this car is 15k P/Y

My Wife is 40 and has an 07 reg VW Polo 1.4 (petrol) auto (about 8k P/Y)

The problems that we have insuring these cars is that I no longer have any NCB as I have been on my Wife's insurance for the last 15 years, from when we first moved out, and both cars are hence in her name. No claims or convictions for both of us in the last five years. Both cars would need to be fully comp.

Another sticking point is that I need to have business use on the Golf (having it on the Polo as backup would be a huge plus as well) as I'm kitchen manager for Meals On Wheels, so every day I deliver meals to the elderly on a set route, for three hours, with no more than 30 miles all told. I would say half of the mileage on the Golf is for delivering (about 8k)

Does anyone have any suggestion on a decent insurer? Many thanks in advance