PIP replaced Disability Living Allowance (DLA) as a disability benefit for working age claimants for all new claims starting from April 2013.
PIP is similar to DLA in that it has a daily living component and a mobility component. However, the daily living component of PIP has only two rates, rather than the three rates of the care component of DLA.
In addition, the method of deciding whether you are eligible for PIP is very different to DLA and has much more in common with Employment and Support Allowance (ESA), as it is based on a points scoring system.
Age limits for PIP are also different to DLA as it does not affect children under 16 (who can still continue to claim DLA.
If you are receiving DLA and you were over the age of 65 on 8 April 2013, then you will continue to receive DLA and will not have to claim PIP.