Evening Mikey , i've fished in Essex all my life and i have fished many of the day ticket waters over the years .
I'm based more in the south west side of Essex bordering on east london and therefore not over familiar with your part of the county .
The problem you have , and it is a problem is that you want the young lad to catch so need a venue that will pretty much guarantee it and that is easier said than done .
Theres not a lot of point in me recommending the 2 venues that i fish most of all because although they are not rock hard they are not runs waters either and since they are not my cup of tea i'm not familiar with many of them .
What i can recommend is a little lake in Braintree
Its the most beautiful place you've ever seen , totally secluded , you'll probably be the only ones there , especially if you book it midweek , the Carp go to 30lb+ (which are far from easy to catch) but there are many many doubles etc which are fairly easy to catch .
I've recommended it to a few people on here over the years but , to my knowledge , nobody has took the bull by the horns and actually been , and they really have missed a treat .
The owner is an absolute diamond too .
http://m.dawnsvale.co.uk/site/mobile?dm_path=%2Findex.htm&fw_sig_session_key=e323c0e777c62836acd4efe1993fd1339df41a0208f60ce9726524bae5631bb3-32282648&fw_sig_premium=1&fw_sig_url=http://www.dawnsvale.co.uk/&fw_sig_api_key=522b0eedffc137c934fc7268582d53a1&fw_sig_permissions=none&fw_sig_access_token=39b5e8f401e16e80960444e5c188dd615eef8c49&fw_sig_locale=en-US&fw_sig_tier=0&fw_sig_social=1&fw_sig_is_admin=0&fw_sig=ea10879d5daa8b3a35925131d0699b00&fw_sig_partner=webs&fw_sig_permission_level=0&fw_sig_site=32282648&fw_sig_time=1434310722569&fb_sig_network=fw#1221