With Lamar Johnson still recuperating from the injury suffered in the game against Norwich United, the decision was made to sign the young professional who has already spent time on loan at Conference South Billericay Town earlier in the season.
Larkins was between the posts for a West Ham XI July, as Blues saw off a West Ham United XI 4-1.
He was registered with the FA and League this morning, and is therefore eligible for selection for tomorrow’s FA Trophy match against Ashford Town (Middx).