Who are the top five design companies within the UK?

Top 5 Design Agencies in the UK (My prediction)
As i couldn't find on Google or any other place the top 5 i found a article on the top 50 Award winning Agencies in the UK.

1.Venture Three
Link Adres

2.Williams Murray Hamm
Link Adress

3.1HQ (formerly Vibrandt, Vibrandt Form and the Distillery)
Link Adress

4. True North
Link Adress

5. Engage
Link Adress

I have the Link Adress to the top 50 Design Award winning agenices just below but the 5 above in my eyes, i would say they are some of the best in the UK due to there designs. 

http://www.design-intellect.co.uk/top_50_design_agencies_list.html