You can email them to ask for a test API key up to 1000 hits a day. If you sign a contract you can use 180,000 API hits every six month period for free. Beyond

You can email them to ask for a test API key up to 1000 hits a day. If you sign a contract you can use 180,000 API hits every six month period for free. Beyond that there is a cost of £1.50 per 1000 API hits.