Looks like you need to act if you're thinking about getting into the UK under an ancestral visa. A bill will be going to parliament in November 08, with possible serious consequences on the ancestry route:
Extract from the Green Paper consultation document
"129. We also need to determine the position of the â€˜UK ancestryâ€™ and â€˜retired persons of independent meansâ€™ routes within the new system.
130. The UK ancestry provisions were introduced in 1972 and allow a Commonwealth citizen, aged 17 or over, to come to the UK provided he is able to show that one of his grandparents was born in the UK and that he intends to take or seek employment in the UK. This route currently provides an avenue to settlement after five years, in line with existing employment routes. Those entering under the UK ancestry route have free access to the labour market on entry. Given that the proposed immigration system provides explicit routes to the UK for those coming as economic migrants, family members or refugees, we need to decide whether a Commonwealth nationalâ€™s ancestral connections to the UK are sufficient to allow them to come here to work without the need to satisfy a resident labour market test. We are therefore asking this question as part of the consultation contained within this paper. We will take the results of the consultation exercise into account before coming to a decision."
"Chapter 3 â€˜Three routes to citizenship and three stages in the journeyâ€™
4. Do you think the â€˜UK ancestryâ€™ route should be abolished?"