Yes, I'd noticed those as well, for a few quid a time... Lots of tiny trades by a boiler room employed to keep the price up I suspect. Can't last forever though, as today's price action shows!
EMR just whizzed through the last 10-15p without pausing for breath, so I'd expect a small retrace before it goes any further. The PS acquisition has completed and the company highlighted this Hardman research note on the back of it:
http://www.hardmanandco.com/system/files/research_papers/Empresaria%2021.10.15a.pdf
Let's see how management bed this acquisition in now...