The British Horseracing Authority (BHA) announced on Tuesday that an additional Jump fixture will take place at Market Rasen on the afternoon of Sunday 22 April.
This is to account for the sustained recent period of disruption to the Jump season caused by the weather.
Entries for the seven race card will close tomorrow, Wednesday 18 April at 12 noon, with declarations as normal on Friday 20 April.
The full race programme and further fixture information will be available via the racing admin site www2.racingadmin.co.uk in due course.
This is the second of four Sundays when additional fixtures are due to be scheduled to account for the overall interruption to the Jump season caused by the weather.
In other news the BHA announced that the Jump fixture at Ayr on Monday 30 April announced on Monday has been moved to Monday 7 May.
This is to allow for the programmed Jump jockeys' break to take place from 28 April - 5 May. The fixture had previously been programmed without consideration of the break period.
The opportunity to stage a Flat fixture on Monday 30 April will be offered out to northern Flat racecourses in the coming days.
Full fixture details for Ayr's Jump fixture on Monday 7 May and the new Flat fixture on Monday 30 April will be confirmed in due course.
Paul Johnson, Head of Racing at the BHA, said: "The wellbeing of our participants is a priority for us all, and it is for this reason that we scheduled the Jump break in the first place.
“The Jump schedule in the north had been seriously affected by the weather in recent weeks and months and we have tried to schedule additional fixtures when it is feasible to do so. At the time we took this opportunity to provide additional northern jump races at Ayr, we didn’t factor in the Jumps break.
“Although the fixture should not have been programmed during the break, we have acted as quickly as we can to redress it and hopefully the transfer of Ayr's Jump fixture to Monday 7 May allows Jump jockeys to take their well-earned break.
"Our thanks go to Ayr racecourse for accommodating the change of date, and the Levy Board for assisting with the funding.”