FOIA2 reply

I've received a reply from my FOIA2 query, which is not satisfactory: This is a gist of the letter, will post scanned image later.

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In Spring 2006 the old insrtuctions were withdrawn. The instructions contained details allowing short periods spent here without existing leave to be disregarded. The new instruction was drafted and ensured that the guidance focused on the actual wording in the immigration rules closely. This is not a change in the rules, but a clarification of the position on breaks in continuity.

Finally in regard to your final question concerning contingency plans, I can confirm that the Border and Immigration Agency does not hold the information you have requested.
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This begs the question -- have the rules changed or not? Why won't they give me the information I requested under the FOIA, regarding the decision to include the continuity rule?