ML ID checks UK Company Foreign shareholders

I have been approached by the local managers of a UK company to assist with preparation of payroll and monthly reports for their directors (possibly annual accounts).

Company is UK registered

Directors

Three resident in Taiwan

One resident UK

Shareholders

98% held by one of the Taiwanese directors

1% held by the UK director

1% another Taiwanese director

Last (abbreviated) accounts show shareholder deficit £723k. I will clearly need to get further information but assume the vast amount owed is to participators.

I need to have a closer look at their situation and requirements before deciding whether to accept appointment but assuming I decide to act from a ML ID point of view what is the sensible way to comply?