Use of asset

Dear Sir,

I am a bit confused about a simple question. Can you please help me with it.

So, the question is: Van plc provides its employees with various benefits. The benefits were provided throughout the tax year 15-16 unless otherwise stated.

Denzil was provided with 2 mobile phones. Phones cost £250 each when purchased by vary plc in Jan 15. Company paid for Denzil business and private phone calls.

According to me, the taxable benefit should be for one phone only, £250 * 0.20 * 3/12. Is that correct?