Yes, you can. To quote from the guidance on this, "as part of their ITT contracting authorities may, if they wish: (1) apply the “pass/fail” mandatory and discretionary criteria as set out in Clause 23 of the Public Contracts Regulations 2006, (2) undertake a financial check. This should be conducted in line with the general principles set out in PPN 02/13 supplier financial risk issues, and (3) where the capability of an individual is essential to the delivery of the contract, for example, the provision of consultancy, CVs or references may be requested to assure the credibility of delivery as part of assessing quality at the award/ITT stage.
For consistency, if the authority wishes to assess supplier suitability as part of their advert or ITT the authority should select from the bank of questions contained in the supplier suitability check, but not deviate from the wording in these questions. Any questions selected must be relevant and proportionate. Contracting authorities may continue to use the industry standard PAS91 for works contracts that are above the EU threshold for goods and services."