I would suggest this is a compensation event under clause 60.1(1) as it is a change to the Works Information i.e. a new constraint that you did not have before. Therefore yes you should show how you now plan to meet these new "target dates".
However - and this is the important bit - the Employer will have no real contractual recourse if you fail to meet that new "target date" as there is only such remedy for missing Key Dates (clause 25.3 undefined cost) or sectional/Completion Date (Delay damages under X7). They are therefore of limited contractual benefit to the Employer.
However - and this is the important bit - the Employer will have no real contractual recourse if you fail to meet that new "target date" as there is only such remedy for missing Key Dates (clause 25.3 undefined cost) or sectional/Completion Date (Delay damages under X7). They are therefore of limited contractual benefit to the Employer.