like many of you i spent many frustrating months and no little credits hunting through the 1911 UK census (www.1911census.co.uk) for relatives who made it >from Lithuania to UK early in the century - two things became apparent only gradually and my difficulties may help those just setting out to use this census:
unlike the 1901 and earlier census many non-naturalised Jews put under nationality "Hebrew" rather than Russian, German etc and we all know how the enumerators of the 1901 census often entered German for any Yiddish speaking family wherever they came from.
Advice then is enter 'Hebrew' as a keyword if all else fails. second point is be prepared for terrible mistakes in the searchable transcription - only after months of used credits did i find my grgr grandfather because the transcription entered him as 99 instead of 66 as clearly entered in the photo of the census itself - any search for less than 99 led nowhere till i found him by chance - another relative was entered under the family name of his adopted daughter although his surname was clearly in the picture of the record itself!
www.1911census.co.uk are happy to correct this when you point these mistakes though this does not help at the time of the search. Advice then is search under every possible contingency if the obvious does not pop up at the beginning. Happy hunting.