Tate Modern is always good for a stroll through its magnificent Turbine Hall: Richard Tuttle's 'I Don't Know'. The Weave of Textile Language is the largest installation by this renowned American sculptor, and the newly commissioned piece thoroughly suits the space. Its arrival coincides with a retrospective of the artist's work at the Whitechapel Gallery. I couldn't resist the chrome yellow walls on the second floor - a sharp contrast to all the black and white I'm wearing - top by Jesiré with sequinned collar and cuffs; Italian trousers by Massimo Rebecchi, with more sequins; and silk sling-backs by Dolce & Gabbana. The vintage fur is from the '70s and the velvet bag, with cane handle, is even older. Up on the second floor at Tate Modern, a retrospective, Alibis: Sigmar Polke 1963-2010 highlights the work of one of the most radical and original artists of the past 50 years, who used an unlikely array of materials and media to work with - from soot and bubble wrap, to potatoes and python, as well as ground dust from a Chilean meteor! This true astronaut of the experimental was also given to wearing his own art - note the image at the entrance to the show - of Polke draped in a litany of archaic German insults called: 'The Large Cloth of Abuse'.