Or get a generic quote at an estimated date of delivery, then when full details are known, ie reg, dates etc, convert the quote into a policy. This may change price slightly if original estimates dates do not match real dates, but pro rata, its normally only a couple of £. Quotes normally last around 30 days and best pricing is often 20 or so days from point of inception. This allows best pricing to be achieved without knowing full details. You can usually run multiple quotes from same provider, and quotes from multiple providers in parallel which will also allow a quote period of > 30 days and not committing until absolutely necessary. Its often best to actually call an insurance company when converting quote to policy - with some it seems like this may be the only way. Normally its just a 5 - 10 minute call to confirm any differences from the original quote, such as providing them with a confirmed registration number, collection date and possibly invoice price should you have been asked for a purchase price.