Brian will be 25
Working it out by thinking about the numbers
If Brian's age begins with 1, his father's age should end with 1
Brian's father's age won't end with 1 until Brian is more than 20
If Brian's age begins with 2, his father's age should end with 2
Adding the same number of years to each age
So their ages will be each other's reverses in 11, 22, 33... years time.
Next time is in 11 years, 14 + 11 = 25
Using algebra to find numbers that are each other's reverses and are the correct distance apart
Brian's age written $ab$, Brian's age is $10a+b$
Father's age written $ba$, Father's age is $10b+a$.
$41-14 = 27$ so Brian's father is $27$ years older than Brian.