Staff Conference - Benefit in Kind

Is a 3 day staff conference which includes hotel accommodation considered a benefit in kind and will need to go on employee's P11D?

Hi
If this is a work event and therefore part of an employees substantive duties, then any travel, subsistence and accommodation would not be a reportable benefit.  
This is covered by the exemption on business journeys.  
More information can be found at:
Tax and National Insurance contributions for employee travel: 490 
Thankyou.
Regards.