Microcosm - 2nd Seedrs crowd-funding round

good question then..

If we invested £500, can we invest another £500 or is it by percentage to maintain the overall 'value' of the shares?

Will it simply be

1st time invest £500 of the £50,000 therfore we can take up £1,000 of the £100,000? (2 for 1)
or can we only invest
£500 of the £50,000 therfore we can take up £25 to maintain the 100%? (5% of original)

Yes.

But you'd do it in two parts.

Part 1 - In the 10 days before it goes public you'd exercise your pre-emption rights to preserve your %.

Part 2 - When it goes public you'd put the rest in.