Long-tailed Tit (Aegithalos-caudatus) Bottle Tit (from shape of nest) 14 cm; 8 g
Despite appearances, this bird is not realy a tit, and may be related to the exotic babbler family.
The Long-tailed Tits chief call note is a spluttering 'tsirrup', also 'tupp' and the usual tit 'si-si-si'.
http://www.thegrangecl.co.uk/blogpage.php