Yeah this is what FW had to say on the price in the latest newsletter:

MkIV Outrider Squad Pricing Error
The Legion MkIV Outrider Squad should be £45, rather than £60 as originally advertised; apologies for any inconvenience caused by this error. If you have ordered one of these kits at the incorrect price, a refund has been processed for you covering the difference in price and any relevant shipping cost, and you will have been notified of this by e-mail.
Nice price reduction and £45 is a much fairer price for these lovely models. Apology and immediate refund is good customer service.