I have just replaced my Humax HDR Fox T2(broken) to a Humax DTR2000 Youview box. I currently have a video/ir sender/receiver box which also sends out a ir remote control signal from the living room to the tv in my bedroom which is all i used to use this box for as the video signal is poor. I also have an rf modulator which goes from the scart on my Youview box through the modulator to a coaxial cable that goes from the living room to my bedroom tv just for the video/audio signal. This setup used to work with the HDR Fox T2 as in using the remote control to change channels etc. I cannot get the same setup to work with the Youview box. From what I understand the Youview box uses a higher frequency (56khz??) than normal ir receivers. If anyone could recommend a solution to the problem or has a similar problem help it would be much appreciated. As im getting rather confused as to what I should purchase. 
One option I came across is the Marmitek Powewmid XL infrared extender set but not sure if it will work with the Youview box.
One option I came across is the Marmitek Powewmid XL infrared extender set but not sure if it will work with the Youview box.

tried it on my previous hdr and it worked no problem, I had to hit a ir receiver sweet spot, it was on the front of my dtr-2000 just to the left of the front panel on/off button with my ir transmitter about 5cm away, I tried for ages previously to get it working :/ . Guessing its a must try harder scenario on my behalf