Table:
text: National Assembly for Wales election, 2011
Regional Vote ( )
Regional Vote ( )
Dates_conducted Cons Plaid_Cymru Lib_Dem UKIP Green Others_ Lead_
5 May 2011 22.5% 17.9% 8.0% 4.6% 3.4% 6.7% 14.4%
14 April 2011 20% 18% 8% 4% 2% 4% 24%
30 March 2011 20% 16% 8% 6% 2% 2% 25%
8 March 2011 20% 18% 5% 5% 4% 2% 25%
26 January 2011 20% 21% 8% 4% 2% 4% 21%
22 December 2010 22% 21% 5% 5% 3% 2% 20%
24 November 2010 20% 20% 9% 4% 3% 4% 21%
27 October 2010 18% 23% 9% 6% 2% 3% 21%
3 May 2007 21.4% 21.0% 11.7% 4.0% 3.5% 8.8% 8.6%

Question: What was the leading percentage in the National Assembly Election for Wales, 2011, Region of Wales regional vote on 5 May 2011 ( ) ?

Question: On what date in 2011 was the lead in the regional Assembly elections for the Welsh general election 8.6%?