@Kathy_Z 

Thanks for your response

In answer to your questions

1  I tested my speed sometime ago and got 4.3 Mbs download, 7.6 Mbs upload which the camera supplier said is not great but OK

2 I am using free CMS software recommende by the camera supplier ( www. gardenature.co.uk). I dont know if it is CMS5

3 Today I  took the camera downstairs and used a 2m long ethernet cable to pug directly into the router without using the powerline adapters. The images stll showed a time delay of several seconds.

4. In the present test set up the camera is only 2 metre from the upstairs adapter and the downstairs adapter is about 2 metres from the router. If I ever get it working the camera will be about 30 metres from the powerline adapter.

What could be storing the images to produce the delay of several seconds ? The CMS software ? , the router? or could the camera itself have some memory ?