What I can understand from the stats shown for your gigs is that it seems like most of the views and clicks that you are getting are coming from external sources other than from the Fiverr website itself (for example – from forum members, or from social media). I am basing this assumption based on the fact that one of your gigs has no impressions… and yet, it has clicks and views.
Now, coming to your question… I’ve personally noticed that the statistics (number of impressions, clicks, and views) only refresh once a day. I have even narrowed down the window when this refresh happens to between 3 am and 5 am (CEST time, Germany). Since you are in the UK, maybe the refresh happens 1 hour earlier (your time). That’s probably the reason why you see the stats go up after you wake up in the morning.