30 January 2007, Brunel University, Mathematical Physics Seminar. Abstract. Transparencies.
17 April 2007, 59th British Mathematical Colloquium, Swansea University. Abstract. Transparencies.
10 July 2007, 18th International Conference on General Relativity and Gravitation, Sydney, Australia. Abstract. Transparencies.
29 August 2007, Origins town meeting, UCL. Abstract. Transparencies.
21, 22 and 26 November 2007, Cardiff, Swansea and Birmingham Universities. Abstract. Transparencies.
5 December 2007, Inaugural Lecture, UCL. Transparencies.
1 July 2008, conference Analysis, PDEs and Applications on the occasion of the 70th birthday of Vladimir Maz'ya, Rome, Italy. Abstract. Transparencies.
1 September 2008, International Conference on Partial Differential Equations and Spectral Theory, Goslar, Germany. Abstract. Transparencies.
11 November 2008, International Conference on Recent Trends in Mathematical Sciences, Bahrain. Abstract. Transparencies.
30 January 2009, Mathematics Colloquium, King's College London. Abstract. Transparencies.
13 February 2009, Mathematical Foundations meeting, UCL. Transparencies.
17 July 2009, 12th Marcel Grossmann Meeting on General Relativity, Paris. Abstract. Slides.
Updated 3 October 2009