I haven’t seen the official ECB umpires list for 2021 anywhere so not sure who has officially replaced the retired Jeff Evans and Jeremy Lloyds on the full list. My money would be on James Middlebrook and Tom Lungley due to their longevity on the reserve list and their regular first team appointments in recent seasons. Chris Watts and Rob White have matches in the first round of fixtures above so can’t be ruled out.
Good to see the ICC elite trio of Kettleborough, Illingworth and Gough in action too.