Dual Listings for Tiziana Life Sciences

[Markus365]

Hi there, bit of a newbie question here but i'm holding shares in Tiziana Life Sciences but can see two listings. The UK shares I have now look to be on a different code to the US shares TILS Vs TLSA. I can see that the US stock went up a huge amount yesterday 20th Jan but can not see this reflected on the UK version of this stock. I thought that dual listed stock should be the same price albeit the only difference being the exchange rate conversion?

Wondering if i need to get out of the UK stock and move over to the US to take advantage of the upward trend? Just can't get my head around what is going on here and why the UK version didn't open up showing the gains that were made on the US version of this stock. 

Really appreciate any insight here that anyone can provide. 

Thanks IG community.