ATC Go Around instructions
 

Folks, if you do a go around and have not received anything different to the go around instructions when on approach the planned go around is to be flown. What is the general guidance for ATC to start issuing new instructions when you have commenced the missed approach? Is it bad practice ? It’s a fairly busy time to be given different instructions for both level and lateral. Any insights to standard practice ? Ty

I have been given new departure instructions by tower during take off roll.

Not related to go around, but you get my drift.

You'd have to check in the country specific AIP to find guidance (if any) on this.
Where I work, issuing instructions immediately after commencing a miss would be considered not the best, and only if somewhat urgent/essential.
It is assumed the crew would perform a standard miss for the approach they're on, unless an alternative was agreed to at some stage prior. We also have procedures that should ensure there won't be a loss of separation with a departure ahead should anyone make a missed approach, so the issuance of instructions at this time would imply something's gone wrong.

I had one go around issued in LHR rnwy 09L and two in CDG both on 27R. All of them due spacing with the aircraft ahead not clearing the runway expeditiously. All three go around instructions included instructions to “fly heading xxx° and climb to altitude xxxxx’ and contact arrival on xxx.xx”

Set the autopilot. If you’re limited (below 1000ft on ie 737 classic), readback ’standby’, standard climb until autopilot is available, set it and PM has plenty of time to talk to ATC.

Keep it simple.

USA: Technically when you're cleared for the approach, you're cleared for all segments for the approach that are still in front of you, including the published missed. However, it's widely understood that you are 99% likely to receive alternate instructions (a heading and altitude).