Tangible book $0.61 (50p) right now.18 May 2020 15:00
According to gurufocus.com , this stock is trading well below the tangible book of £0.52.
Other sites show price to book of 0.34 to 0.42, i.e. book price from 25/0.42=59p to 25/0.34=73.5p.
This is a forecast from yet another site (marketscreener.com):
Book value per share (usd): 2,10 (2017) 2,08 0,70 0,61 (2020) 0,80 0,58 (2022)
The book value according to this is 50p right now.