Kim, you are very bad!
Most Ikea lights are E27. Cheapest pendant for £5, including the shade. https://www.ikea.com/gb/en/p/melodi-pendant-lamp-white-60386527/
There's also this approach: https://www.electricals247.co.uk/lamp-socket-converter-bc-to-es.html
Paging Diver300. Diver300 to the GSM Trimphone, please...