They ask questions for a reason, lying or being economical with the truth to get a cheaper quote may seem like a good idea in the short run but its crazy. If anything happened, especially if its serious, they will go through the policy with a fine tooth comb to avoid paying out and they are rightly justified in doing so. If you purposefully distort the truth and get bitten tbh you deserve it.
I've just done my renewal. Shot up from £423 to £555, but then i knew once in a blue moon i travel to work in the zed so i needed to add commuting to the policy. I also plan a couple of europe road trips so i upped the annual mileage from 8k to 12k. I also ensured the policy allowed me more than 30 days driving in Europe. Could i have conveniently missed this off the policy and saved some money, yes. Did I, hell no i'm not taking the risk. If something goes wrong they pay out not me. I also then bargained them back down and got a quote i was happy with. In the meantime i can sit back and relax knowing i am fully covered.