Broadly speaking, a plea entered prior to an conventional trial/hearing may be considered indicative. You probably want to be asking the court(s) to vacate the pleas, sooner rather than later.
As regards, the s. 172 charges, if it was not reasonably practicable to provide the information within the statutory 28 days, *and* you provided it as soon as was reasonably practicable afterwards, you have a defence. If you were simply waiting to see what else was going to drop through the letterbox, not so much.
As regards the speeding, logistically if you were exceeding the speed limit continuously for the entire duration, that is only 1 offence. If you slowed to below the speed limit in between the times you were recorded, not so much. This is a separate argument to the multiple offences on a single occasion argument.
Some posters mostly know exactly what they're doing and only need clarification on one or two points. They do not typically plead guilty to charges that they feel they have a defence for.
If you don't want to provide meaningful information for us to base our advice on, that's entirely up to you. In much the same way that closing the thread when you exceed our tolerance for drip feeding is down to us.