Citizenship application Travel SAR

[wodinsrage]

Hello.

My wife is preparing to apply for her full citizenship after completing her permanent residence under FLR(m).
Most of the criteria is bog standard at this point, but we have a quick question regarding travel history. My wife travels a great deal with work and we have tried to keep track of her ins and outs, but we are apprehensions about getting this correct. We have been told that she can request an SAR from UK.gov to confirm dates. The question we are seeking is which of the three types (Basic, Detailed or specific) of requests do we need to make just to get the minimal information of travel history for the last 3 years?

Any help would be super.

regards,