Back from holiday and fond these critters on my phone

So these little buggars have shown up lately and I’ve been waking up with itchy bites, trying to identify what the bug is, can anyone help me out?

I have some videos which are clearer than photos but it won’t let me post them.

For context:

\- Live in South UK, next to a river with a lot of bugs

\- Heatwave lately so windows have been open over night

\- Recently came back from a holiday in Crete, also stroked some friendly stray cats which I’m now regretting

\- Only found them on my phone so far but I’m assuming these guys are also elsewhere in the home