UK Company supplying services to a contractor in the Republic of Ireland

A UK contractor will be invoicing most of his income to a RoI company (supplies not goods) with expected annual turnover of between £70K-£80K (with say another £5K UK based turnover)

My understanding is that the "B2B" rules state that for UK VAT, the RoI supplies are outside the scope of UK VAT so no need to register here regardless of the level of turnover. However, a quick look at the RoI VAT website suggests the client will need to register for VAT in the RoI as a "foreign trader"

Would appreciate any pointers for anyone who's had experience on this kind of arrangement as to whether this is correct, and any referrals for RoI contacts who I can direct the client to if needed.

Thanks in advance