Twenty-seven-year-old Keenleyside joins the Blues from Spartan South Midlands League Premier Division side Harpenden Town.

He returned to Harpenden in 2016 from Dunstable Town and made 55 appearances and scored 8 goals.

He made a name for himself after joining St Albans City in 2012/13 from London Colney.

He went on to become a favourite at Clarence Park, playing over 100 times and scoring a dozen goals.

He moved to Dunstable in the summer of 2015 after a return to Harpenden on loan in 2014/15.

Johnson joins Hertford after recently leaving former Bostik League North rivals Grays Athletic.

Johnson left Grays last week after making over 150 appearances in two spells with the Essex outfit.

He returned to Grays last summer having previously spent four seasons with the club between 2012 and 2016.

During that period, he made 108 appearances and was a key member of the team that won the Isthmian League Division One North title in 2012/13.

Prior to his spell at Grays, Johnson had played at youth level with Charlton Athletic and Thurrock, before playing for Aveley and Romford.

He returned to Aveley in 2016/17 season and he received all three of the club's player of the year awards.