Please answer the given financial question based on the context.
Context: ||2019|2018|
||Number|Number|
|Outstanding at 1 April|3,104,563|2,682,738|
|Options granted in the year|452,695|1,188,149|
|Dividend shares awarded|9,749|–|
|Options forfeited in the year|(105,213)|(766,324)|
|Options exercised in the year|(483,316)|–|
|Outstanding at 31 March|2.978,478|3,104,563|
|Exercisable at 31 March|721,269|–|
The number of options outstanding and exercisable as at 31 March was as follows:
The weighted average market value per ordinary share for PSP options exercised in 2019 was 445.0p (2018: n/a). The PSP awards outstanding at 31 March 2019 have a weighted average remaining vesting period of 0.8 years (2018: 1.2 years) and a weighted average contractual life of 7.6 years (2018: 8.2 years).
Question: What was the change in the amount Outstanding at 1 April in 2019 from 2018?
Answer:
421825