Borrow a booster for a child 7y/o girl Sept 17-26 (Palmer Park RG1)

I’m looking to borrow a car seat or high-back booster for my 7-year-old daughter, who is about 20 kg and 127 cm tall, from September 17 to September 26.

We’ll be staying in Reading and would be very grateful if anyone has a spare one we could borrow for those 10 days. Happy to collect and return it anywhere around Reading. Thank you!